Beneath the Sugar Sky by Seanan McGuire
My rating: 5 of 5 stars
A wonderful addition to the series! You can read this as a stand-alone, which is one of the ways I judge how well a series book works (is there a lot of "previously"? can anyone access the book?) - and this book is great in that way.
The worlds that the author creates feel familiar but only because they're the worlds we always read about and want to visit, the worlds that children always somehow manage to find a way into and that adults can't find. Here there's a great homage to Baum's world, specifically the town of Bunbury and country of Merryland (ok, that's how I saw it, ymmv) with a side of Willie Wonka. I can't wait to see which doors and what worlds we explore next.
ARC provided by publisher.