Meet Me in the Margins by Melissa Ferguson
A book summary is below the review.

Sweet romance, here we come!
A lot of my romance reads have toed the line with erotica. LOTS of sexytimes. Not that that is a bad thing. But Meet Me in the Margins was a breath of fresh air and a lovely change of pace.
A first-person perspective and brilliantly funny inner thoughts make this book so enjoyable. Even, maybe especially, when Savannah goes off on odd thought tangents.
Savannah is a kind, loving, and absolutely walked-on kind of character. She always seems to defer to whatever is polite and non-confrontational both personally and professionally. While exhibiting the ability to defend, she doesn’t tend to do so for herself. She will, however, very much stand up for those around her. She is the every-woman who doesn’t think she’s special in anyway and is always judging herself. Interestingly, you don’t get the poor, pitiful Savannah feeling from it either. The author manages to make Savannah feel like you know her, are her, or could easily be her.
The premise of Savannah working for a haughty, commercial-fiction-is-trash publisher while secretly writing and trying to get a romance novel published is a fun vehicle for the love story. Who knew you could get to know someone so well through how they edit what you write.
All-in-all a quick, fun read. Perfect for the beach in the summer.
Book summary (per Goodreads):
Savannah Cade is a low-level editor at Pennington Publishing, a prestigious publisher producing only the highest of highbrow titles. And while editing the latest edition of The Anthology of Medieval Didactic Poetry may be her day job, she has two secrets she’s hiding.
One: She’s writing a romance novel.
Two: She’s discovered the Book Nook—a secret room in the publishing house where she finds inspiration for her “lowbrow” hobby.
After leaving her manuscript behind one afternoon, she returns to the nook only to discover someone has written notes in the margins. Savannah’s first response to the criticism is defensive, but events transpire that force her to admit that she needs the help of this shadowy editor after all. As the notes take a turn for the romantic, and as Savannah’s madcap life gets more complicated than ever, she uses the process of elimination to identify her mysterious editor—only to discover that what she truly wants and what she should want just might not be the same. Melissa Ferguson’s latest—a love letter to books, readers, and romance—will leave fans laughing out loud and swooning in the same breath.
