Reddit mentions of Assembly Language for Intel-Based Computers - Textbook Only

You will find malware to be written in plenty of languages including Visual Basic, c++, C, etc. For C I highly recommend the Ansi C book, It's short, clear and comes with code examples and exercises at the end of each chapter.

Reversing c++ is similar, but there are many nuances to it depending on the compiler used. For c++, and at your level I would recommend the Dietel and Dietel book
http://www.amazon.com/How-Program-6th-Paul-Deitel/dp/0136152503/ref=sr_1_2?ie=UTF8&s=books&qid=1267536050&sr=8-2-spell

In terms of assembly, I recommend a few books:
First:
http://www.amazon.com/Assembly-Language-Intel-Based-Computers-Textbook/dp/000501395X/ref=sr_1_5?ie=UTF8&s=books&qid=1267536245&sr=1-5
Second:
http://www.amazon.com/Professional-Assembly-Language-Programmer/dp/0764579010/ref=sr_1_3?ie=UTF8&s=books&qid=1267536245&sr=1-3
and Third:
http://www.intel.com/products/processor/manuals/

Good luck.