For a limited time, you can grab a compendium of all five Hitchhiker’s Guide to the Galaxy novels for you Kindle for just $4. [The Ultimate Hitchhiker’s Guide to the Galaxy, Douglas Adams (Kindle), $4]

In honor of Jon Stewart’s final farewell, Amazon is offering up to 80% off dozens of Kindle books from his most popular guests, today only.

The titles range from $3-$6 each, so this is a great chance to fill up your Kindle for cheap. Options include everything from J.K. Rowling’s new novel to Neil deGrasse Tyson’s thoughts on NASA’s future to Mike Huckabee’s homophobic fever dreams, so chances are you can find at least a couple titles that interest you. If you have any recommendations, be sure to sound off in the comments. [Amazon]

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