This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
.chm files are opened by "Microsoft� HTML Help Exe". You are not "running" the .chm file itself, your are running HTML Help Exe which opens and interprets the .chm file for you. That being said, .chm files are just compiled HTML. Decompiling them is easy; MS supply a tool to do just that (search MSDN). So you could decompile them and access them as plain text files.