The movie Legend of the Guardians is based off of the first three books in the Guardians of Ga'Hoole series:
The Capture, T
he Journey and
The Rescue (just to throw it out there, while I liked Legend of the Guardians, the way the books were combined and the way the characters and overall story were changed leaved much to be desired and my eye starts to twitch in a maddening way).
Zack Synder plans to write and direct a sequel "sometime soon" but there is no guarantee that this will happen (simply because it will take a couple of years in order to make the movie).
And just FYI, there are 15 novels in the Guardians of Ga'Hoole series, not 8. If you count the two accompanying books (
A Guide Book to the Great Tree and
Lost Tales of Ga'Hoole) plus the Wolves of Beyond books, then there are 20 books in the overall series.
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