The Merlin Consipiracy by Diana Wynne Jones ****

This is about the aftermath of after the Merlin of the Isles of Blest dies. A few people realize that the Merlin's replacement are plotting to use magic for themselves. Two of those people are Roddy (a girl), Grundo (a inside-out boy), and Nick Mallory (a boy from another world), and Romanov (a powerful wizard who lives on a island made from different worlds). 

I like this book because it is interesting and adventurous (although it was kind of confusing because of the way it jumps from character to character).

I recommend this book for ages 9+.