Linnet, the main character, is a Fable Weaver, responsible for making sure that all figments return to Tierra Fabula (the place where characters go after their stories are over) from their vacations on earth. Always around to guard and assist her are Sekker, Arkose, and Izar - a trio of changelings with an obsessive love for cinnamon and video games.
The best thing about this book is the fact that it literally give you the best of both worlds, from car chases to sword fights, attic crawlspaces to Camelot, security systems to enchantments, and struggling to outsmart everyone from the local police to Morgan le Fay.
Really, the only thing that the book left me wanting (aside from a sequel) is a bit more explanation regarding how Linnet became a Fable Weaver in the first place, because other than a brief mention of it in passing at the beginning of the book, we really don't get a lot of information on that.
Otherwise, this is a fun and fabulous story that you can enjoy over and over (although I recommend having a plate of snickerdoodles handy when you do - you'll understand why when you read the book).