More of the late George Carlin's writing will be published in a book, to be released in 2011. ((HBO/Associated Press))

Fans of late comedian George Carlin will have another new book of his unique observations to look forward to, with a collection of writings and letters set for release in 2011.

Gallery Books, a division of Simon & Schuster, announced Wednesday plans to release The Permanent Courtship of Sally Wade: The George Carlin Letters next year.

The book, which will be illustrated by Wade, Carlin's widow, will include notes and correspondence penned by the revered American comedian, who died of heart failure in June 2008.

Wade will also offer her own memories of Carlin's final years.

The insightful and counterculture comedian became the first-ever posthumously honoured with the Mark Twain Prize for American Humor in November 2008. At the ceremony, his daughter, Kelly Carlin McCall, revealed that he had been working on an autobiography at the time of his death.

That book, Last Words: A Memoir, was released in November 2009.

Aside from his acclaimed stand-up on stage and television, he also recorded more than 20 comedy albums and published several bestselling comedy books, including Napalm and Silly Putty, Brain Droppings and When Will Jesus Bring the Pork Chops?

With files from The Associated Press