This is one of Connelly's best in recent years. There has not been Jack McEvoy book since "The Scarecrow" in 2009, and a lot has changed in McEvoy's life. Rachel Walling, an old aquaintance and amour of Harry Bosch makes an appearance, and a lot has changed for her too. This books brings out the overall lack of security, and safeguardingof privacy of DNA sampling, and many of the hidden dangers of DNA storage, the DNA Ancestry business, and of Cell phone spying and tracking, internet fraud, and many more things that now violate our personal privacy. Much scrutiny is required of these things, and governments everywhere are moving much too slowly and doing very little or nothing to remedy that. I gave this book only 3 stars because it has a bit too much of fine details, and general filler. McEvoy is at times a very irritating personality, and his own worst enemy. All in all, a worthwhile read from Connelly who has been slipping a lot in recent years. I'd like to see another Mickey Haller ( a.k.a. The Lincoln Lawyer) book from him.