The Drop by Michael Connelly

Harry Bosch is getting close to retirement age at the LAPD. He's now working in the cold case squad and has just started investigating a puzzling case in which blood evidence makes it appear that an 8 year old was a rapist and murderer. So begins The Drop. Before Harry can delve further into that case, he's called upon by the higher ups to investigate the death of a city councilman's son--who fell, jumped or was pushed off a hotel balcony. Along the way, he also has to deal with a partner he's not sure he trusts, a teenage daughter he's now raising alone and a possible new romance.

I love the way Michael Connelly writes.You're just drawn into the story. I also love the character of Harry Bosch. He's the kind of cop you'd want on the case if something happened to you or someone you love.