Need help finding a book

[Mbeaton]

I came across a book 8 to 10 years ago,and wanted to read it. The problem is I forgot the title. All I remember is that it was a new release either in the science fiction or fiction section. It was about a guy who woke up in a strange land, with warriors and fighters across different eras: knights, ninjas, cowboys, etc. I believe they had to fight each other to return home. Please help.

[Jacob]

The Transall Saga?