BOOK worms can cram a bag or box full of books and pay what they want for it at Gladstone Library on Friday and Saturday.

With icy westerlies combing over Gladstone, it's the season for reading, and the library is catering for the city's reading needs with a sell off of old books. 

Lucy Lennon, treasurer of Friends of the Library, the group running the sale, urged parents with young kids to buy early as children's books have previously sold quick. 

But she stressed the sale would offload a wide range of fiction and non-fiction books for all ages, which are either donated by locals or have been sitting on the library's shelves for over five years. 

"We've even had travellers come through and buy books because they want something to read on their way," she said.

"Books go around the world that way."

Ms Lennon said takings would be reinvested in the library, adding that without the cash earned in previous sales, the library wouldn't have the new furniture, educational technology, TVs, and other resources.

She said the logic behind "pay what you think" deal is "everybody loves the library and they want to see it progress", so people offer a fair price.

The sale will run from 9am-5pm on Friday and 9am-3pm on Saturday.