The Caspak Trilogy

Here are all three of Edgar Rice Burroughs' classic Caspak series in one volume: The Land That Time Forgot, The People That Time Forgot and Out of Time's Abyss. These works were first published in Blue Book Magazine as a three-part serial in 1918. The complete trilogy was first published as one work under the title The Land That Time Forgot by A. C. McClurg in 1924.