Body by Qwark

Body b Qwark is an exercise book written by Captain Qwark. It first appeared in Ratchet & Clank: Tools of Destruction where Qwark gave it to Clank as a prize, along with the Holo-Pirate Disguise, saying that it would give him 'calves of a champion.

It apparently didn't sell well as since then copies of the boo can be found as easter eggs in several games.

In Quest For Booty, several copies can be found near the shore of Hoolefar Island near a golden stature of Captain Qwark.

In A Crack in Time the book can be seen during the cutscene where the Plumber is pulling out times from a green pipe in Clank subconscious.

In All 4 One one can be found in the background during the cutscene after the Wigwump boss fight

In Full Frontal Assault A pile of them can be found on the Starship Phoenix II

In Into the Nexus it can been seen on the shelves at the gift shop of the Intergalactic Museum of History

Apperances
Ratchet & Clank: Tools of Destruction

Ratchet & Clank: Quest for Booty

Ratchet & Clank: A Crack in Time

Ratchet & Clank: All 4 One

Ratchet & Clank: Full Frontal Assault

Ratchet & Clank: Into the Nexus