Animorphs fans will want to collect this bestselling series in four-volume sets with a full-color slipcase cover. This set includes Animorphs #17: Underground, #18: Decision, #19: Departure, and #20: Discovery.
- ISBN10 0590284975
- ISBN13 9780590284974
- Publish Date 1 August 1998 (first published 12 December 1931)
- Publish Status Active
- Publish Country US
- Imprint Scholastic US
- Format Paperback
- Language English