- ISBN: 9781423135821 (electronic bk.)
- ISBN: 1423135822 (electronic bk.)
- Physical Description: 1 online resource (327 pages)
- Edition: 1st American ed.
- Publisher: New York : Disney/Hyperion Books, 
- Copyright: ©2009
|Summary, etc.:|| Fifteen-year-old Billi SanGreal has grown up knowing that being a member of the Knights Templar puts her in danger, but if she is to save London from catastrophe she must make sacrifices greater than she imagined.
|Source of Description Note:|| Description based on print version record.
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Young adult fiction.