Mary D'Costa Books

Mary D'Costa

I have a background in the biosciences and law, but would rather write. Neighborly Chemistry is my first work of fiction, releasing on August 31, 2026. Coming soon after, is the stand alone spin-off, Professional CourtesyWhat is Neighborly Chemistry about?
Grinding through an eighty-hour lab week in a Nobel Laureate's MD-PhD program, stressed-out Victoria Darling has zero patience for her infuriatingly serene neighbor, Stephen Souza—Hollywood’s favorite wellness guru. To Victoria, Stephen represents everything wrong with modern health culture. But when academic betrayal destroys her career, the celebrity quack she dismissed becomes her best ally. As Stephen helps her in her fight against the man who stole her future, Victoria discovers Stephen isn't who she thinks he is—and falls for the last person she ever expected.
Standalone contemporary Hard STEM romance (the science is...significant).
Features enemies-to-lovers, neighbors-to-lovers, opposites attract, reversed grumpy / sunshine, slow burn, humor, and a satisfying HEA.
Trigger warnings:
It has explicit content (absolutely consensual), and sexual harassment and power dynamics in academia.


Neighborly Chemistry on Pre-Order Now!
Professional Courtesy Coming Soon!


Note: It appears that Facebook thinks I am a bot. If you have reached me on Facebook but not received a reply, it's because I have been locked out. If they restore my account, well and good, but I am hardly going to tear up and give in.They claim that my account has been restricted on account of unusual activity. I find that immensely suspect, and refuse to give in to their bid to harvest my biometric data. I would rather they delete the account completely than comply with their violative demand to scan my face through video. Given these circumstances, the best place to reach me is here.

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