Agent Spike and the vegetables of doom - Mark Burgess

Spike - an undercover secret agent - is dragged from his classroom one ordinary morning to tackle a problem that's getting out of control. Vegetables are taking over the scientific research institute, and anything that's not a vegetable is considered a weed - that includes the staff of the institute and the prime minister, who is due to make a visit that afternoon. To add to the problems, rivalries are breaking out between different species of veg. Can the problem be contained in time? And will Spike survive a confrontation with the Big Pumpkin, the Vegetable Chief?