Is exactly what you want as it supposes no knowledge about a different platform to Windows. It holds you by the hand as it walks you through how the system works and what the supposed standards actually are. Actually it covers the much more important different names for things which most newcomers at first find confusing and explains the Pro's and Con's of different things in Linux Like why KDE and Gnome are different and what each advantages are.
For some more advanced Nix Publications there is always the individual Distro's papers on their distributions.
You can also look at things like the Art of Linux Programing which really is a [b]Must Have Book[/b] available here
http://tinyurl.com/mfunu
While you may not be interested in programing this explains how the system works.
There is always Linux is not Windows available here
http://tinyurl.com/8b9s6
This is quite good though lacking a bit in the more in depth details.
Or you could join a Linux User Group in your area you should be able to find one in the list here
http://tinyurl.com/fu97y
Also the different Distro's have some good publications to explain how their different flavours of Linux work so that might be useful as well.
Never forger that [b]MICROSOFT is an acronym which actually means [i]Most Intelligent Customers Realise Our Software Only Fools Teenagers.[/b][/i]
While Puppy or DSL [b]Dam Small Linux[/b] are good for a play around they really lack the power to do any real work, I generally use them for testing hardware when RAM is at a premium and if I have plenty of available RAM I use Knoppix STD to test the hardware and do a few other things that are useful.
Don't get me wrong they both provide a very powerful platform to build on but most newcomers get lost quickly when they start adding the required software for their needs.
Once you know what you want to use I would suggest that you download the Paper work that comes with that Distribution and places like Ubuntu have their own Users Forum which proves quite helpful or so I'm told.
Lets know if I can be of any more help to you.
Col