Riley's Time Travel Adventures (paperbacks)

This series follows the erotic adventures of young college student Riley, who discovers a time machine that transports her to different historical times and places. In each new setting, she must use her knowledge of history and her unique skills to survive perilous situations and help her new friends overcome hair-raising challenges. But one thing is certain: wherever she goes, there's no shortage of exotic and sexy partners with whom she experiences one dripping-wet encounter after another...