A light-hearted science-fiction story in which Spiky Jackson believes that an alien has infiltrated Chivvy Chase School in the shape of a student, Jason. Philip Curtis is the author of "Mr Browser and the Brain Sharpeners".
| Author | Philip Curtis |
| Publisher | Penguin Books |
| Year of publication | 1990 |
| Number of pages | 118 |
| Language | English |
| Format | Paperback |
| ISBN-10 | 140343946 |
| ISBN-13 | 9780140343946 |
| Illustrator | Tony Ross |
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