Skin Deep (Siobhan O'Brien #1), by Sung J. Woo

15 Aug 2025

The Book

Skin Deep
Series: Siobhan O’Brien
Pages: 400
Age Group: Adult
Published on 17 Jun 2025
Publisher: Datura Books
Genres:
Thriller

Synopsis:

Korean-American adoptee Siobhan O’Brien has spent much of her life explaining her name and her family to strangers, but her more pressing problem is whether to carry on the PI agency that her dead boss unexpectedly left to her. Easing into middle age, Siobhan would generally rather have a donut than a romance, but when an old friend and asks Siobhan to find her daughter who has disappeared from her dorm room, the rookie private detective’s search begins in Llewellyn College.

A private institution of higher learning in upstate New York, Llewellyn, for the first time in its two- hundred-year history, has opened its doors to men, causing a clash between the female students and their former fashion-model president. The financial reasons prompting the change seem like a ruse when fringe- group The Womyn of Llewellyn, aided by Siobhan, discover a newly built science center, which is under 24- hour surveillance.

As Siobhan delves deeper into locating the missing girl and campus politics, she encounters vegan cooking that just might kill her, possibly deadly yoga poses, and politely dangerous billionaires.

My Review

Skin Deep is the first book in the cozy mystery series Siobhan O'Brien, written by Sung J. Woo, and published by Datura Books. A kinda cozy noir proposal that mixes the best of detective methods with a really relaxing sense of humour that helps to alleviate the tension, with a thrilling pace that suits really well the genre.

Siobhan O'Brien, a Korean adoptee, works as an assistant PI; when her boss suffers a coronary, leaves his agency to Siobhan. Immediately she gets a first case, as her friend Josie needs her to find her daughter; a difficult investigation that will take her to the Llewellyn College, getting involved in the dangerous politics of the university and embroiling herself into something bigger, hoping that it will be the key to find Josie's daughter.

Great part of the charm of this novel resides in the own character of Siobhan; while she's clearly outside of her element at many moments, we see how, at many points, she actually manages to advance the investigation in part due to her kindness. A bit naïve for the PI business, but it suits well with the kind of plot Woo is trying to establish. The rest of the secondary characters are kinda forgettable, eclipsed by Siobhan.

The pacing is really fast, partly motivated by how Woo is using really short chapters; I kinda liked how this makes you devour the book. Despite being a noir story, there's no much violence; many of the humour moments are introduced around stereotypes and physical characteristics, alleviating the tension that naturally grows in the genre.

Skin Deep is a nice cozy mystery proposal, introducing a character with a lot of potential and that knows how to play to its strengths. I'm kinda curious to know how it will be the next Siobhan O'Brien adventure!

The Author/s

Sung J. Woo

Sung J. Woo

Sung J. Woo’s short stories and essays have appeared in The New York Times, PEN/Guernica, Financial Times, and Vox. He has written five novels, Deep Roots (2025), Skin Deep (2025), Lines (2024), Love Love (2015), and Everything Asian (2009), which won the 2010 Asian Pacific American Librarians Association Literature Award. In 2022, his Modern Love essay from The New York Times was adapted by Amazon Studios for episodic television. A graduate of Cornell University with an MFA from New York University, he lives in Washington, New Jersey.