BellsandMitch,spacealiensfromtheplanetExergy,comebacktoEarthformoreexcitingadventuresinscience!OurheroesdivedeepintoEarth’sPacificOceantosolveaproblem:howcantheyprotecttheirhomecityonExergy?CouldthecreatureslivinginthePacificOcean--whousecamouflagetohidefrompredators--holdtheanswer?JoinBellsandMitchastheyusetheprinciplesoftheengineeringdesignprocesstoask,imagine,plan,create,andimprovetheiringenioussolutioninBookTwooftheEngineeringEverythingseries.
