Dressed in their costumes, Ollie and his siblings go out on Halloween night and have a scary but fun adventure.
- ISBN13 9780544640542
- Publish Date 19 July 2016 (first published 6 September 2010)
- Publish Status Active
- Publish Country US
- Imprint Houghton Mifflin
- Format Paperback
- Pages 32
- Language English