Spellbound - S3-E6
Continuity mistake: After the book starts talking, a startled Raven lets it drop onto the ground; the book lands so the viewers can see its spine. Following the commercial break, however, the scene switches sides, and the spine is pointing the opposite way from before so that the viewer can still see it. Correctly, the spine should be obscured from view and the page edges should be seen.
Chosen answer: It is located in California, as shown in "Teen Titans: Trouble in Tokyo". Possibly San Francisco as seen in the comics.
MasterOfAll