If you go to jenniferboylan.net and the messageboards associated with it, she lists the "Black Book" series (and the pseudonym of Jonah Black) as her own.
....Then there are the four young adult books, which I was paid to write, which we dont' talk about.
jenniferboylan.net/paranormal/showthread.php?t=377 no longer exists
But if you wanted a full list, it'd be this:
REMIND ME TO MURDER YOU LATER (1988), Johns Hopkins University Press. Stories.
THE PLANETS, (1991) Poseidon/Simon & Schuster. Novel
THE CONSTELLATIONS (1994) Random House. Novel
GETTING IN (1998) Warner Books. Novel
4 Young adult books, published under the pseudonym "Jonah Black" (1999-2000)
* Diary of a Teenage Stud: I. Girls Girls Girls
* Diary of a Teenage Stud: II. Run Jonah Run
* Diary of a Teenage Stud: III. Faster Faster Faster
* Diary of a Teenage Stud: IV. Stop Don't Stop...."
https://books.google.com.au/books?id=Fb4IEAAAQBAJ&pg=PT224
