I have released a PI novel for Kindle, A Small Sacrifice. From the description on Amazon:
Detective Nick Forte is not impressed when Shirley Mitchell asks him to clear her son’s name for a murder everyone is sure he committed. Persuaded to at least look around, Forte soon encounters a dead body, as well as the distinct possibility the next murder he’s involved with will be his own. Clearing Doug Mitchell’s name quickly becomes far less important to Forte than keeping references to himself in the present tense.
Nick Forte has been kicking around my hard drive for a while; he's the character I cut my writing teeth on, an appears as a "guest star" in Grind Joint, to be released by Stark House in November.
A Small Sacrifice is currently available for $2.99 (or whatever the equivalent is in Amazon's over..., as well as part of the KDP lending library program.