I've haven't read this one, but spotted the deal in a twitter re-tweet by a writer I like (Chuck Wendig).
Free on kindle (US) for the next 36 hours
Witness to death (
main)
John Brighton is an ordinary young schoolteacher still hung up on his ex, Michelle. Suspecting her new boyfriend is cheating on her, John decides to follow Frank's Lexus and find out the truth once and for all. Turns out John's in for a major surprise. Frank isn't heading for some sack time with another girl. Instead he drags John into the middle of a shootout on the banks of the Hudson River, and before John knows what's happening, he's knee-deep in bodies.
**Rated one of the 12 Best Crime Novels of the Year by the Milwaukee Journal Sentinal**
“An engrossing, evocative debut novel that will grab most readers from its opening sentences… fans of hard-hitting, uncompromising private investigators will hope that Donne ditches his college dreams and continues to pound the pavement.” Publisher's Weekly (Starred Review)