Deprecated - Documentation

i need documentation for drupal.
please send me because i'm not enough money to buy it
thank you very much
book title:Creating Blogs, Forums, Portals, and Community Websites
 

The following is a comment that I posted on the web page Handbook -> Installation and configuration -> Introduction to Drupal terminology -> Terminology ( http://drupal.org/node/937 ):

In Drupal, the forums subsystem/module is referred to as "forums". Within those forums you have forum containers (general forum topics). Within those forum containers you have individual forums, also referred to as "forums". Within those lower level "forums" you have forum "topics" (a content message posted in a
forum). Withing a forum topic you can have comments in reply to a topic. For example:

• Drupal Forum Module/Subsystem (called "forums")
• Form Container - Software for Beginners (An example of a "forum container". Shows up as "Home » forums » Software for Beginners" )
• Forum - Pro's and Con's of Hello World Programs (An example of a specific forum subject area also called a "forum". Shows up as "Home » forums » Software for Beginners » Pro's and Con's of Hello World Programs)
• Forum topic posting - An example "Hello World" program in C (An example of a specific posting of content in a forum. Called a forum "topic")
• Comment - Your example sucks (A "comment". An example of a second type of content posting in a forum. Comments can only be in response to a forum "topic")

So "forums" can refer to the top level subsystem/module or to an lower level forum subject area under a forum container

Going through the modules, their READMEs, their help and even some of the associated project pages, I've seen a variety of spelling and grammatical errors, as well as a variety of explanations that were unclear and "cute" comments that detract from the professionalism of the documentation.

I've only recently started to delve into Drupal and made extensive use of the documentation. One thing I noticed is that there are often crucial errors - either simple tiny syntax errors that make people look for far more fundamental flaws or outdated approaches that result from Drupal updates without being reflected in the docs.

The comments are usually a great way to get corrected information, but it quite often takes a while.

What precisely does $node->revision mean? I found a $node object reference, but it was incomplete (in particular they said "not sure" about $node->revision.) Is there a complete object reference? And if not, why not? :)

I hope I haven't overlooked the obvious. Excuse me if I have. I've been looking for a step-by-step tutorial on how to secure a drupal site. I'm subscribed to the security newsletter and mailings and keep my versions updated, but I'm just now about to take things live and wanted a simple guide to make sure things are secure. For instance, permission settings on files, etc. I'm on a shared hosting system, 1 and 1. Just looking for a check list that's understandable enough for a newbie. Thanks in advance. Are there any modules that lock the system down in one swoop?