The Phineas and Ferb Where's Perry? #11: Missing Platypus: Includes a Platypus Mask! (Phineas & Ferb 8x8 (Unnumbered))

A spy mission gone terribly wrong causes Agent P to disappear! Will Perry ever make it back home? Or will Phineas and Ferb never see their pet platypus again? This 8x8 with original illustrations will retell Part 1 of the two-part cliffhanger episode Where's Perry? and includes a platypus-shaped mask!