Every breath You take, by Ann Rule

"Multi-millionaire genius Allen Blackthorne was a violent sociopath who hid behind his classic good looks, charm and money, and left a trail of con jobs and wives in his wake.

When blonde, beautiful Sheila Bellush first met Blackthorne, it seemed as if she had found her soul mate. But instead, their marriage took her into a world of lies, scams and sexual deviancy.  When she finally fled from him with her two small daughters, she was skeletally thin, bruised and beaten. Sheila recovered and eventually remarried.  But Blackthorne's millions and his power enabled him to find her.  And a killer found her as well, and left her in a pool of blood, marked by four sets of timy fooprints."

A true story of erotic obsession, revenge and murder.

*Please note: This book is second hand but, in general good condition.