This is such an incredibly fun and unique series. Like I said after I read the first book, this isn't necessarily a youth series except for the age of the protagonist. The story is pretty complex, as are the personal relationships. I have yet to dislike a Fforde series (as you may have noticed) but this is probably my second favorite after the Thursday Next books. They stretch my imagination and have a plethora of moral and physical conundrums that have me already awaiting the third book -- and the requisite rereads of these two!
Feeling the magic,