This will contain a few minor spoilers but should not ruin the book for anyone.
I have to admit I did not read the first two books but I did see the movie and I tend to get bored reading books AFTER seeing the movies so I skipped them. It was not hard to "catch up" on this one tho.
While James Patterson is a good writer and a well known author I don't think this was one of his better books sadly. I think there were a lot of questions left unanswered and things just thrown in. I wanted to know more about the game "Jack and Jill" were playing and why they were playing the board game. Neither one of the motivates were ever explained and when the true killers were caught at the end it just didn't fit for me. I was like huh? It just felt as if it didn't fit.
Minor Spoiler here----
When Christine's husband gets shot and killed I sort of felt like it was a way Alex could finally be with her without it seeming so horrible. You never meet her husband or know how she feels about his up until this point but you know how Alex feels about her every time he see's her to the point it gets annoying and obsessive.
I have always liked James Patterson tho and have a hard time giving his books less then three stars and maybe this one did deserve two but the writing was good and I will read at least a few more in the series.