PREDATOR BY TERRI BLACKSTOCK

PREDATOR by TERRI BLACKSTOCK is an exciting thriller.  
Krista Carmichael has lost her sister Ella and she and her father David are determined to find her killer.  It seems as though she has been targeted by a predator who has joined her friends' list on GrapeVyne, a social network used by a lot of young people.  In their "bubbles" they give away far too much information, including their whereabouts practically every moment.  Krista confronts Ryan, who started GrapeVyne which he still runs, and tells him he himself is a predator by allowing such things to happen!  She is outspoken about the dangers of the site and speaks to young people at school to warn them.
When Ryan gets involved in trying to help catch the killer and wants to warn youngsters of the dangers of giving out too much information, he is warned by the board at Willow, who are afraid that he will cause their business irreparable harm.  He has been bought out by Willow, and when he and his friend Ian  start digging into Willow, they are both fired.
Ryan used to be a believer, but when he became totally involved in his work, working long hours, and also became very rich, he seemed to have forgotten about the Lord.  Krista, on the other hand, is very involved with helping young women in dangerous areas, leading them in Bible study, counselling them and generally encouraging them.  When more young girls become victims she begins to doubt God, wondering where He was when terrible things happened. 
Megan is a young girl who is targeted by the killer and who manages to escape with her life.  Krista, Ryan and the police run  lots of mug shots from the GrapeVyne data base and from the police files, but she cannot recognize her killer in any of the photos.  It is very sinister, as the predator could be posing as anyone on her site.
David, Krista's father, is devastated by what happened to Ella and doesn't trust anyone.  He is ready to kill the person responsible for his daughter's terror.
The story is very relevant in these days of cyber friendships. The plot is fast-moving and exciting and the book is very hard to put down.