Enjoyable sequel to Time After Time. In this one, H.G. Wells must follow his wife Amy back to the year 2010 after she decides that she must go there to warn her parents of a potential earthquake in that year. Her parents have moved from San Francisco to Beverly Hills and the time machine just happens to be in Los Angeles on exhibit. But when Amy traveled to 2010, she inadvertently went to infinity first and this enabled Jack the Ripper to return as well. However, Jack has been transformed into a woman, the titular Jaclyn. From there, the book has a lot of similarities to Time After Time with Jaclyn out to get Wells and Amy and obtain the key that will allow him/her to use the time machine at will. A lot of bloodshed along the way as Jaclyn terrorizes modern day LA. These books do draw heavily on Wells' real life including his marriage to Amy and his subsequent trysts with other women. One of these was named Amber Reeves who was also a character in this book. Overall, I would recommend this just slightly less than Time.