Google has some fantastic potential for you to find whatever you are after on the internet.

To search for a book / program / file perhaps try the following.

Go to Google's search page and use the following criteria in the search dialog

intitle:index.of? file extension Name of item

e.g. intitle:index.of? chm syngress

This will hopefully give you a listing of all websites that google has cached that contain references to files in CHM format that are published by SYNGRESS.

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I use in Google

+("index of") +("/ebooks"|"/book") +(chm|pdf|zip|rar) +syngress

or

allinurl: +(rar|chm|zip|pdf|tgz) Syngress
Enjoy