I wrote my book for the criminal investigator but the crime writer with limited forensic or firearms knowledge may be interested in it:
ANALYZING BALLISTIC EVIDENCE, On-Scene by the Investigator, available on Amazon and B&N. Great reviews (on Amazon and selling well, no reviews at B&N but I really have not been marketing it on that venue). $6.99
You can check out my ebook video trailer at:
http://www.youtube.com/watch?v=M26m7G1fncs
Thanks for looking. If you read the book and it helps your writing, please write a review!
Tony Latham