While this is a good adventure series for younger readers, this volume did have a couple of disturbing acts of bug violence-- a scorpion stinger is driven into a lizard's open mouth, fire ants sting the lizards and leave them moaning in pain, and Barton grabs General Komodo's tongue with his pincers! Readers who are sensitive to this sort of graphic violence, even if it is concerning bugs, might want to pass.
The inclusion of Webster, the shy Trap Door Spider, was interesting, and Spike and Barton are certainly distinct personalities.
This series definitely lends itself to some imaginative play, and I can see young bug enthusiasts planning their battle strategies with an entomological guide by their side. If they have a magnifying glass, they'll have to be careful with it or the lizards will be the least of their "army's" worries!