I tend to read these Harry Bosch thrillers in a whatever order I come across them in charity/second-hand book shops, rather than the order in which the author wrote them. Sometimes, there are fun coincidences by doing that. This book is supposedly an anomaly in which Harry Bosch works as an investigator for his half-brother Micky Haller (he refers to this as the dark side, having recently retired from the LAPD): but in The Night Fire, the last book I read in this series, he did exactly the same thing!
The crossing referred to in the title is where the victim and the accused cross paths – and that’s the problem in this case. Despite efforts by the original investigators on the crime, no connection was made between Lexi Parks, a manager at the council, and Da’Quan Foster, a former gang member who now runs a reputable business. Whilst DNA evidence put DQ at the scene of the crime, Micky Haller is convinced that his client is innocent and enrols Bosch to take a look at the case. Bosch too is unsatisfied, especially given the frenzied nature of the attack.
In a parallel story line, Ellis and Long, two LA vice cops, are taking the law into their own hands – intimidating Micky Haller and his investigator as well as tailing Bosch. The challenge for Bosch is to find the real killer of Parks, starting by tracing her missing watch (a rare and expensive timepiece). He must also persuade the accused, DQ, to divulge his real alibi, which opens another line of enquiry into the recent murder of local prostitute James Allen.