Final answer:
The question seems to conflate Book Scavenger, a fictional game in a novel, with historical information regarding William Lloyd Garrison's launch of The Liberator in 1837, an abolitionist newspaper.
Step-by-step explanation:
The question you're asking about Book Scavenger seems to be a bit confused with historical information. The reference to William Lloyd Garrison launching The Liberator in 1837 is historical, while Book Scavenger is a fictional book-centric game from a novel.
If you're asking when Book Scavenger was launched within the context of the novel by Jennifer Chambliss Bertman, it would be a fictional date. However, if you're asking about Garrison's The Liberator, it was indeed launched in 1837 and was a significant abolitionist newspaper of the time, with Garrison at the helm as editor.