The Mystic Master - Romanian Chronicles, #4

Gage was kidnapped years ago and taken far from his home in America. He was sold into sexual slavery to the owner of a mining operation in Russia, but soon found himself being used to reward the miners for their productivity. He dreams of escape every day. He is finally rescued by a mysterious man who seems to be able to do magic. He has an unusual reaction to his emancipators and is taken to their camp in Romania.
The coven master appears and offers him a job opportunity, but Gage turns out to be something the warlocks have never encountered before. The coven master tests him and Gage knows that he has met his true Master. Gage is torn between seeing his family for the first time in years or staying with the man of his dreams. And deep inside he knows that he still wants revenge.