The Lego Movie : the Essential Guide  by Hannah Dolan. Learn all about your new favorite movie.
Cool Creations in 35 Pieces by Sean Kenney. Check out the other Lego books by Sean Kenney too.
The Lego Adventure Book Vol . 1 by Megan Rothrock. Don't forget about volume 2!
The Lego Book  by Daniel Lipkowitz. This book is everything Lego!
And don't forget to check with your local library branch. Lots of them have Lego clubs and activities and even more Lego books. Happy building!