When the Animorphs try to stop the tiny alien Helmacrons from taking the morphing cube, Marco gets in the way and ends up with Helmacrons up his nose and inside his head.
- ISBN10 0606188606
- ISBN13 9780606188609
- Publish Date 1 June 2000
- Publish Status Out of Print
- Out of Print 28 May 2021
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover (Library Binding)
- Language English