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Alcatraz #4: Alcatraz Versus the Shattered Lens (edition 2010)
Amazon.com Product Description (ISBN 0439925576, Hardcover)
The fourth and final book in the fabulously funny Alcatraz Smedry series!
Alcatraz Smedry is on a mission to save the day! In his final adventure in the series by bestselling adult fantasy writer Brandon Sanderson, Alcatraz has a lot to prove and, as always, little time in which to do it!
(retrieved from Amazon Fri, 22 Apr 2011 19:13:24 -0400)
When a hero is needed to save the doomed kingdom of Mokia from the evil Librarians, thirteen-year-old Alcatraz Smedry, whose family talents include getting lost and breaking things, answers the call.
(summary from another edition)