What books did Jack Trelawny?

It seems you're asking about Jack Trelawny, a figure associated with the historical events surrounding the Cornish Rebellion of 1497 and the life of the famous privateer and explorer, Sir Francis Drake. However, there is no record of Jack Trelawny ever having written any books.

It's possible you are thinking of:

* Jonathan Trelawny, a 17th-century English clergyman and Bishop of Bristol, who wrote some religious works.

* Sir Henry Trelawny, a 17th-century member of the Royalist gentry during the English Civil War, who was a supporter of the monarchy.

To answer your question more accurately, it would be helpful to provide more information about the specific Jack Trelawny you're interested in.

For example:

* What time period are you interested in? (15th century, 17th century, etc.)

* What is the context? (Is he a fictional character, a historical figure, etc.?)

With more information, I can better assist you in your search!