The Klaatu Diskos 1 The Obsidian Blade by Pete Hautman The Obsidian Blade by Pete Hautman (Candlewick Press, April 2012).
The Klaatu Diskos 2 The Cydonian Pyramid by Pete Hautman The Cydonian Pyramid by Pete Hautman (Candlewick Press, May 2013).
The Klaatu Diskos 3 The Klaatu Terminus by Pete Hautman The Klaatu Terminus by Pete Hautman (Candlewick Press, April 2014).