内容简介：
Someone is using a transporter to commit daring crimes, and all the evidence points to Professor Walters Can Delena and the Jones family help the professor prove heas innocent, and help catch the criminals while theyare at it? Packed with adventure and high-tech gadgetry, Derth picks up where Delena left off, reuniting Delena, the professor, and the Jones family in a wonderful young adult fantasy adventure. Derth is a wholesome story for readers of all ages. If you enjoyed Delena, youare going to LOVE Derth If you havenat read Delena yet, what are you waiting for?