MILLION DOLLAR THEFT GREEN APPLE C1 (+CD)

Two years have passed since Susan, Brian and Jim solved a baffling mystery in
San Francisco. This time they have to solve a million dollar mystery: Mark
Twain’s secret diary has just been discovered and publishers all over the
world want to get their hands on it… but it suddenly disappears without a
clue! Susan, Brian and Jim are determined to find it.

Dossiers:
Mark Twain in the Gold Country
San Francisco and the Gold Rush
Alcatraz Island