Presents three previously published works about a pet raven named Mortimer, who talks, eats everything in sight, and causes all sorts of trouble.

While his corvid buddies spend their days cracking jokes at the dump, raven Otto P. Nudd invents things with his human neighbor Old Man Bartleby, but when one of Bartleby's contraptions puts him in danger, Otto must join forces with kids and critters to save the Old Man.

There is a legend that if the ravens at the Tower of London ever leave then Britain will fall, so when somebody steals the birds, the Queen calls for Mac B. to find the thief and retrieve them--a mission that takes him to Iceland, where he encounters secret submarines, hungry polar bears, and his arch-nemesis from the KGB.