As Arthur prepares for his first sleepover, his sister D.W. and all his friends are talking about the UFOs that have been sighted in the area. However, Arthur, Buster and the Brain don't let the rumours interfere with their plans for a backyard adventure in Arthur's tent.
In typical fashion, D.W. waits until the boys quiet down for the night and launches her own 'alien' invasion, and Arthur thinks of a way to beat her at her own game.
- ISBN10 0099263157
- ISBN13 9780099263159
- Publish Date 8 January 1998
- Publish Status Out of Print
- Out of Print 5 March 2004
- Publish Country GB
- Publisher Penguin Random House Children's UK
- Imprint Red Fox
- Format Paperback
- Pages 32
- Language English