Phineas and Ferb build a mechanical squid to search for treasure buried in Danville's deepest lake. Doofenshmirtz makes his own underwater creature to defeat Perry, but runs into Phineas and Ferb's invention.

Book Summary


Running Gags

The "Too Young" Line

Ferb's Lines

Whatcha doin'?

Perry's entrance to his lair

None, he goes straight to Doofenshmirtz

Memorable Quotes

Background Information

  • Isabella wears a pink shirt and shorts instead of her usual pink dress.

Production Information

Title Description

It's just another awesome day of summer vacation for Phineas and Ferb, and this time they're ready for an aquatic adventure! The stepbrothers decide to build a giant mechanical squid and travel to the depths of Danville's deepest lake to look for buried treasure. Meanwhile, Dr. Doofenshmirtz has built his own underwater creature to try to defeat Agent P—and the tri-state area —once and for all! But when Phineas and Ferb's squid runs into Dr. Doofenshmirtz's invention, will it be a friendly encounter? Or will this day turn into an underwater disaster?

Back Cover Summary





Hat Sale

External links

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The Best School Day Ever

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