300 books • 63 series
Book #1: The Story of the Treasure-Seekers
Book #1: The Story of the Treasure Seekers;Being the Adventures of the Bastable Children in Search of a Fortune
Book #2: The Wouldbegoods
Book #3: New Treasure Seekers; Or, The Bastable Children in Search of a Fortune
Book #3: New Treasure Seekers
Book #2: The Railway Children (Illustrated)
Book #2: From the Dead