It is a while since I last read a Peter James novel, 2014 to be precise, but this one was a real page turner, so much so that I found myself another of his books to read when I finished this one.
From the cover:
“Virtual romance becomes a terrifying obsession in Want You Dead . . .
Single girl, 33, redhead and smouldering, love life that’s crashed and burned. Seeks new flame to rekindle her fire. Fun, friendship and—who knows—more maybe?
In Peter James’ Want You Dead, thirty-year old Red Cameron meets handsome, charming and rich thirty-five year old Bryce Laurent through an online dating agency, and is instantly attracted to him. But as their love blossoms, the truth about his past begins to emerge, and with it his dark side. Everything he has told Red about himself turns out to be a tissue of lies, and her infatuation with him gradually turns to terror.
Within a year, and under police protection, she evicts him from her flat and her life. But far from being over, her nightmare is only just beginning. For Bryce is obsessed and besotted with her. He intends to destroy, by fire, everything and everyone she has ever known and loved—and then her, too. It’s up to Detective Superintendent Roy Grace to stop him before it’s too late…”
A great crime fiction read.
Gippsland Granny 
Another one to add to my list, thank you.