![The Sentinel by Arthur C. Clarke · OverDrive: ebooks, audiobooks, and more for libraries and schools The Sentinel by Arthur C. Clarke · OverDrive: ebooks, audiobooks, and more for libraries and schools](https://img1.od-cdn.com/ImageType-400/0288-1/7FE/682/2F/%7B7FE6822F-9CEB-48F7-A830-C36245A3CFA6%7DImg400.jpg)
The Sentinel by Arthur C. Clarke · OverDrive: ebooks, audiobooks, and more for libraries and schools
![Humanoid History on Twitter: "When the Monolith was a pyramid: early concept art for 2001: A SPACE ODYSSEY shows the alien artifact as it appeared in Arthur C. Clarke's "The Sentinel." https://t.co/qNOAc3xMna" / Humanoid History on Twitter: "When the Monolith was a pyramid: early concept art for 2001: A SPACE ODYSSEY shows the alien artifact as it appeared in Arthur C. Clarke's "The Sentinel." https://t.co/qNOAc3xMna" /](https://pbs.twimg.com/media/EYDb_S-XYAA7vz9.jpg)
Humanoid History on Twitter: "When the Monolith was a pyramid: early concept art for 2001: A SPACE ODYSSEY shows the alien artifact as it appeared in Arthur C. Clarke's "The Sentinel." https://t.co/qNOAc3xMna" /
![The Sentinel by Arthur C Clarke - Hardcover - Book Club Edition - 1983 - from Courtney McElvogue Crafts & Vintage Finds (SKU: 781) The Sentinel by Arthur C Clarke - Hardcover - Book Club Edition - 1983 - from Courtney McElvogue Crafts & Vintage Finds (SKU: 781)](https://d3525k1ryd2155.cloudfront.net/h/360/675/1387675360.0.x.jpg)