books

i've got holidays for the next couple months and i've got no social life or off-line friends to speak of.
what are some good text books i can read during this time?
any subject is fine really, as long as it's somehow related to computers.
and by 'good' i mean detailed and thorough, not fun to read.

OP should order the Intel Processor manuals. Order+shipping is free, and Intel will ship it out anywhere in the world.

http://www.intel.com/products/processor/manuals/index.htm

I'm surprised at how accessible it is, even for beginners. The manuals are split into easy-to-digest sections, so don't feel put off by the sheer volume of information.