Jonah and Katherine hope to have a little time to spend in the twentieth century before going on another time adventure, but the past catches up with them when Daniella (Anastasia Romanov in 1918) shows up on their doorstep with their friend Chip.  Before they know it, Gavin (formerly Alexei Romanov) has whisked them back to Russia on July 16, 1918, where time is running out for the Romanov family.  How can Jonah and Katherine save their friends without a fully working Elucidator and without any contact with time agents.  Is there any hope at all when modern day scientists have discovered the remains of the entire family, including the bones of Alexei and Anastasia?

Just like the first five books in the series, Risked by Margaret Peterson Haddix is packed with nonstop action and history.  Just when Jonah and Katherine come up with one solution, ten more problems pop up, including bad guys Gary and Hodge, who have escaped from time prison and are determined to make their money from selling the missing children from history.  As the series progresses (and as the characters grow through their experiences), Haddix explores more of the philosophical issues of time travel and fate and destiny and God.

Of course, we still don’t learn who Jonah was in history, but we do know who he is through his time adventures.  We still have a lot of missing children to account for and to save from history.