Jessica Nyman: 2 books

A young college girl wins a trip to Rome and while visiting the ancient ruins, she gets transported two thousand years back by a mysterious magic artifact. She is immediately seized by the city guards and brought before the most notorious emperor Rome had ever known. She's in for a big surprise and...

Our heroine meets a mysterious witch who agrees to help her go back to ancient Rome. However the locket's magic effects last for a limited time and she comes back to the 21st century when it expires. Will she be able to solve the mystery of the locket and stay in ancient Rome for good? Will she break...