World Without a Platypus (book)

 is a junior novel to be released on July 31, 2012.

Characters

 * Phineas
 * Ferb
 * Candace
 * Perry
 * Dr. Doofenshmirtz
 * Isabella
 * Major Monogram
 * Mom
 * Jeremy
 * Dad
 * Buford
 * Baljeet