Ahoy there mateys! I say this every time I finish one of these novellas but I seriously could read dozens of books set in the various worlds.  This is the 9th book in the series and a direct sequel to book 8.  This cannot be read as a standalone and has spoilers for most of the other books in the series.

Antsy arrives at Eleanor West's School for Wayward Children.  Problems ensue when other students realize that she can find all Lost things.  Does that mean she can find their Doors?  Well Antsy can but should she?

This book was lovely.  Antsy has problems dealing with other children, especially given her aging process.  Favorite characters are pulled into an accidental quest.  There are LOTS of awesome answers about how the Doors work.  Several characters have their storylines resolved in satisfying ways.  I can't give further details cause spoilers.  But I was so glad to read this one and already wish I had the next novella.  Arrr!