Todd and Sly are both outsiders, who do not share the same interests as other boys their age. Together they discover Mr Multiplex, a man with the unusual gift of plexing - the mixing of two creatures. But he has plexed a dog with a gibbon with frightening results. And it has escaped.
First read this as a teenager and wanted to see if it was as good as I remembered. It wasn't quite, but still a fun nostalgia read. Bit like a British Goosebumps story but in the style of Alan Garner. The ending wasn't as scary as I remembered, but some pretty spooky sequences early on. Would probably make a good animated movie.