FOR USE IN SCHOOLS AND LIBRARIES ONLY. When the world is invaded by Mutant Mosquitoes, there is only one pair of heroes to turn to--Ricky Ricotta and his large sidekick, Robot.FOR USE IN SCHOOLS AND LIBRARIES ONLY. When the world is invaded by Mutant Mosquitoes, there is only one pair of heroes to turn to--Ricky Ricotta and his large sidekick, Robot.