Book #3 finds Nate and Patrice riding their bicycles, with the peashooters and squash, being chased by zombies. They are surrounded until Uncle Dave drives up and over some of the zombies. Uncle Dave will take Nate and Patrice to the mansion to start the wind machine, which will blow away the BIG cloud from the city, and thus energize the plants.
When Nate and Patrice get to the mansion the zombies are already there. They get through the zombies to start the machine, but not without a struggle.
The plants are winning until “Zomboss” takes charge. Nate ans Patrice flee. Uncle Dave shows up in a wooden fire-breathing T. Rex sending the zombies and Zomboss on the run.
“Citizens of Neighborville,
Your continued antagonism against our rightful claim on your city and brains is noted. Action will be taken at another time. Sincerely,
Dr. Edgar Zomboss”
Considering this is book 3, and a conclusion of this series, it is a little lean on plot.