The Cryonics Thesis - The why of cryonics, as understood by the Cryonics Institute. - http://www.cryonics.org/reprise.html
Cryonic Suspension - By Henry Kluytmans, a Dutch cryonicist. 5 printed pages. - http://www.dse.nl/bewoners/hkl/e_cryo.htm
Nanotechnology and Cryonics - An introduction by Jerry Emanuelson of Colorado Futurescience. 3 printed pages. - http://www.webcom.com/cfsc/nanocryo.html
A Basic Introduction To Cryonics - The Cryonic's Institute's Introduction to Cryonics. 11 printed pages. - http://www.cryonics.org/prod.html
Cryonics: The Issues - An introduction by Canadian Ben Best, 8 printed pages. - http://www.benbest.com/cryonics/cryiss.html
Ralph Merkle's Cryonics Introduction - Short and useful, but not really "simple." It assumes some knowledge of cryonics already, so read some others first. 3 printed pages, with several internal hyperlinks to other explanations or web pages. - http://merkle.com/merkleDir/cryo.html