You can now download The Collected Works of Edgar Rice Burroughs: 30 Books and Stories (Unexpurgated Edition) (Halcyon Classics) for only 1.99$ here.
Here's the blurb:
This Halcyon Classics ebook contains 30 novels and short stories by noted fantasy and adventure writer Edgar Rice Burroughs. Includes classics such as 'Tarzan of the Apes' and 'The Land that Time Forgot.' Includes an active table of contents. Contents: Tarzan of the Apes The Return of Tarzan The Beasts of Tarzan The Son of Tarzan Tarzan and the Jewels of Opar Jungle Tales of Tarzan Tarzan the Untamed Tarzan the Terrible A Princess of Mars The Gods of Mars Warlord of Mars Thuvia, Maid of Mars The Chessmen of Mars The Land that Time Forgot The People that Time Forgot Out of Time’s Abyss The Mucker The Return of the Mucker The Oakdale Affair At the Earth’s Core Pellucidar The Cave Girl The Efficiency Expert The Girl from Farris’s The Lost Continent The Mad King The Monster Men The Outlaw of Torn This unexpurgated edition contains the complete text with errors and omissions corrected.