H L Dennis

Three children, Brodie, Tusia and Hunter are chosen to help continue the work of a secret club tasked with decoding a book that, so far, no one has been able to read. They move into a mansion, where they masquerade during the day as children who are from a private school taking a museum tour, but really they're attending classes in code breaking during their afternoons.
This is the first in a series, and so, at times, it doesn't move as quickly as I'd like, due to the necessity of establishing background information. While I enjoyed it, I am looking forward to reading book two which should move much quicker.… (meer)