Books like The Shobble Secret

As soon as Nicola and her Space Brigade return from Globagaskar, their services are required on another planet. Planet Shobble, whose natural resources are pink marshmallow and the galaxy's finest chocolate and whose landscape boasts a thousand permanent rainbows, might seem like a paradise, but there's a sinister plot underfoot that threatens all but an elite few. What's more, one of the brigade's own has been taken hostage. Will Nicola et al triumph again? With all that chocolate and marshmallow at stake, one can only hope!