Summary from her website
Kids can save the world – even if it is one frog at a time.
When twin sisters Cyd and Jane are propelled into an international plot involving evil scientists and giant genetically stretched frogs, the girls are in a suspenseful and hilarious race to save the frog kingdom.
Feeling bad after she accidentally stepped on her sister’s frog, Cyd gets swept up in Jane’s search for an answer to the mystery of the giant frogs. But first the twins must out-maneuver disbelieving police and their scientist mom who sides with the geneticists. Cyd and Jane use the Internet, a serum antidote, and good old-fashioned sleuthing to expose harm to the frog kingdom. In the process they discover the link between frogs, the environment and humanity. But will they catch the culprits or will giant frogs take over their city?