|Title:||The Penultimate Peril|
A fun read. The stories continue in the same style and the content continues to get more and more confusing - for the reader and for the main characters - so there are still just as many questions as answers for me. (That's nearly all questions and nearly no answers.) That means book 13 will be very interesting, or it will be a total flop.
At this point I somewhat regret having given all of the previous volumes to my niece & nephew, as I'll probably want to reread them all at some point, once the series is complete.