I am about halfway through 'A Time Of Torment', the latest Charlie Parker mystery by John Connolly. I think there are 14 Charlie Parker books, starting with 'Every Dead Thing', & I have read most of them. I like them pretty much. Parker is a damaged former cop who went into private investigation. That much is expected, formulaic for this type of book. What makes the Charlie Parker books different is the absolute weirdness of the cases he gets involved in. Cults, right-wing fanatics, generations old feuds, towns with racist roots so deep that they entangle everyone around. There's a bit of horror, 'I see dead people' stuff too. And most books seem to build & build the tension, while filling the reader in on all kinds of interesting background info, until there's no way out for Parker but a giant gun fight. That kinda gets old. But the books themselves are riveting. And Parker's team, Louis & Angel... they are funny, loving, intelligent, & full of stories all their own. I wish that they were real because I would so like to meet them.
So I would recommend checking out author John Connolly. You won't be sorry.