Underline That

What better way to close out Season One of  Underline That  than with a celebration of TWENTY SOMETHING ELSE ? This week, we're marking the fresh release with a special behind-the-scenes conversation about the journey that brought this story from dream to bookshelf! Joining Steph are three incredible women who played pivotal roles in her traditional publishing journey: ✨  Danielle Egan-Miller...

With just days until  Twenty Something Else  releases, Steph is pulling back the curtain on the real-life inspirations behind her debut novel with Tyndale House, available on June 9 ! In this special solo episode, she shares ten fun facts about the novel—including the pieces drawn from her own life, the experiences that shaped Sutton's journey, and the elements that are indeed completely ficti...

Join Steph in welcoming beloved New York Times bestselling author Courtney Walsh to  Underline That ! What a total joy to discuss her brand-new novel,  Brighter Than Before , available June 9. This swoony summer read is a joyful, tender, laugh-out-loud story about starting over, finding friendship as an adult, and asking what you really want in the wake of it all crashing down. Steph and Courtney...

Today on Underline That,  Jessica Guerrieri  rejoins Steph for a conversation about motherhood, sobriety, sisterhood, publishing, reviews, recovery, generational trauma—and the way women can hold two completely contradictory emotions at the same time. We dive into Jessica’s brand-new novel,  Both Can Be True , the emotional reality of debut year, audiobook obsession, unlikable female characters, a...

This week on  Underline That , Steph chats with bestselling Christian romance author  Sarah Monzon  about her adorable upcoming release,  Bookmarked for Love —a cozy, bookish romance featuring librarians, literary references, publishing drama, and forced-proximity goodness. Don’t miss this lovable rom-com, available July 21, 2026! Sarah opens up about her journey from indie to traditional publishi...

This week on  Underline That , Steph is joined by  Eliza Knight — USA Today  bestselling author of the upcoming novel  Lost in the Summer of ’69 , releasing June 9. Set against the backdrop of music, memory, and massive cultural change, the novel follows a grandmother, mother, and daughter on an unforgettable road trip after a shocking disappearance. It’s heartfelt, nostalgic, layered, and simply...

In today’s episode, Steph is joined by rom-com author  Andra Loy  to talk about her delightful, magical rom-com debut,  The Roman Holiday Rule   from   Haven Fiction —and the winding, unexpected journey that brought her here. From living overseas for over two decades to writing stories that blend romance with magical realism, Andra shares how her real-life experiences shaped a novel full of heart,...

Today on  Underline That , Steph sits down with historical fiction author Nicola Harrison to talk about her dazzling new novel,  The Island Club —a layered, addictive story set on 1950s Balboa Island, where paradise looks perfect on the surface… but secrets are simmering underneath. They discuss the real-life inspiration behind Balboa Island as a setting, the fascinating history of spring break cu...

Welcome back, listeners! This week’s episode is a quick little bookish life update and personal reflection. After years of publicly reviewing books online, I’m sharing why my relationship with Goodreads has shifted as I’ve gone deeper into author life—and why I’ve recently fallen  hard  for StoryGraph as my new favorite place to track my reading! We’re talking about the complicated reality of bein...

Join two authors as we dive headfirst into AI, book trends, and the piping-hot publishing tea! This week, Steph puts award-winning romance author Heidi McCahan in the hot seat for a fun, candid conversation about some of the biggest topics in the book world right now. From the constant discourse around AI to the rise of “books on boats” (yes, really), we talk about what’s trending, what’s actually...

Packing your spring break bags? Don’t forget the most important item: BOOKS! In this sunshine-filled episode, Steph is joined by fellow voracious reader + bookstagrammer  Hannah of   @hannahk_reads  to build the ultimate stack—filled with swoony romances, bingeable thrillers, meaningful fiction, and a few irresistible backlist gems you’ll want to toss straight into your beach bag. From emotional p...

How many people can say they’ve gone from Team USA to  USA Today  bestselling author? At least one unstoppable, inspiring force—and we’re so lucky to hear from her! Today on  Underline That,  Steph is joined by Sarah Crouch, bestselling author of the literary thrillers  Middletide  and  The Briars , and a former professional runner and Team USA marathoner. Sarah brings truly elite-level insight on...

In this episode of  Underline That,  it’s a massive treat to have an editor in the hot seat! Today I’m joined by Kelsey Bowen—senior acquisitions editor at Baker Publishing Group and one of the brilliant editorial minds behind Haven Fiction , a brand-new imprint officially launching in 2026. Haven is carving out a lane that so many readers and writers are desperately craving:  clean + wholesome, b...

Hi, friends! In this cozy  Behind the Book  episode, I’m sharing what my writing life looks like right now as I gear up for my traditional debut,  Twenty Something Else  (June 9), while preparing two indie re-releases ( When We Blinked  and  Suing  Cinderella) and developing Book Four for June 2027. It’s layered. It’s busy. It’s one of the greatest gifts of my life! I talk honestly about why I’m l...

In today’s episode of  Underline That , Steph sits down with author  Allison Nance , whose stunning debut novel  Deep Cries Out explores womanhood, faith, love after loss, and the courageous fight for healing from anxiety and depression. Allison shares the deeply personal journey behind her book—including her own struggles with anxiety, insomnia, and the emotional terrain that shaped her storytell...

This week on  Underline That , Steph sits down with award-winning author  Toni Shiloh  to talk about her newest novel,  Hearts on the Fly —a heartfelt hockey romance filled with faith, second chances, and unexpected love. Together, we unpack the rise of hockey romance, the emotional inspiration behind Toni’s characters, and how real-life experiences—including her grandfather’s vision loss—shaped t...

What if you could walk through life guided by someone wise, steady, and deeply faithful—a giant whose footsteps show you the way? Great news: anyone can. This week on  Underline That with Stephanie Mack , Stephanie sits down with author and spiritual director  Lori Melton to talk about her beautiful new book,  The Journey with a Giant , and the life-changing practice of spiritual mentorship. Toget...

What happens when a Wall Street veteran swaps spreadsheets for storytelling? In this energizing conversation, Steph sits down with  Kristine Delano , former finance executive turned debut novelist, to talk ambition, identity, mentorship, and her buzzy new novel  The Lies We Trade , hot off the press from Tyndale House! Kristine spent nearly two decades on Wall Street before pivoting into the world...

Welcome back to Underline That with Stephanie Mack! We’re kicking off the second half of Season 1 with a short and sweet reset episode straight from the soul. If you’re craving a fresh start, a little structure, and a friend in your ears, this one’s for you! In this solo reboot, I’m breaking things down into three buckets: 📌  Margin Notes: Setting Goals & Chasing Dreams I’m sharing two of my...

Today’s episode is the  final drop before a cozy winter break —and we’re wrapping up the year with one of my favorite conversations yet. Not to mention, more book recommendations than Santa himself could carry! I’m thrilled to be joined by  Lexi of @LexintheStacks , a longtime friend and one of my absolute favorite book accounts to follow. Her taste is impeccable, her vibes are immaculate, and tog...

Today’s episode is a true travel-lover’s treat! I’m giving you the full scoop on our family’s Paris + London adventure—the magic, the mishaps, the bucket-list moments, and everything we learned along the way. It was our first major international trip with our three girls, planned around my husband’s and my 40th birthdays, and wow… it was everything and MORE! I’m joined by the incredible Kelly Gree...

Today on Underline That , I’m joined by the one and only Sheila Roberts —USA Today and Publishers Weekly bestselling author of more than fifty novels, with millions of copies sold and multiple beloved movie adaptations. Welcome, Sheila! Her newest book, The Man Next Door , is a witty, cozy, Rear Window –flavored mystery about starting over, multiple generations under one roof, and the dangerously...

Let Steph + Stef stack your stockings! In this festive episode of  Underline That , host  Stephanie Mack  and special guest bookstagrammer  Stefanie Zerbe  (@readwithsteph) dive headfirst into the world of holiday reading. From banter-filled romances to charming novellas, they unpack what makes a holiday book truly sparkle — and why this season brings out the best in our  book stacks ! We chat abo...

Grab your paddle and your pup—this episode has it all! Romance, pickleball, dog training, and the heart behind writing stories that make us smile. Stephanie chats with author and dog trainer  Victoria Schade  about her latest rom-com  Pick Me —a story that serves up laughter, love, and a reminder that sometimes the game of life involves letting yourself be chosen. Victoria shares how a local pickl...

It's Steph's birthday episode! I turn forty this weekend, and I’m celebrating with a very special episode: me, interviewing… myself! LOL. That’s right—you can pry my LOL from my dead-cold millennial fingers! From favorite trips, songs, and outfits to lessons learned, joys discovered, things I’m releasing, and things I’m not—we’re talking about it all. Most importantly, the freedom I feel a...