Does anyone has the Kindle version of this book?

Hi All,
I recently bought a Kindle paperwhite 3g.
First things first...
What are the differences between whispernet and free.kindle.com? Especially when comes to converting pdf files.
Recently I converted a pdf file through free.kindle.com but the images (the plots and graphs) are missing in the converted file. How to keep them intact while converting? What is the default eBook file format in kindle paperwhite 3g? What are the available software tools for that? and which is the best among them? This is my first file convert...

The target pdf:
http://fig.if.usp.br/~lucmod/tips/gnuplotbook.pdf

To make things easy, they also have a Kindle version but very hard to get. Do anyone have it?

What about Kindle Voyage? Has it been released in UK? Is it really better than the Paperwhite 3g?

Does anyone has the Kindle version of this book? gnuplot in Action
http://www.manning.com/janert/

You can convert it yourself http://calibre-ebook.com/download

I beleive that kindle format is azw.

I wish ppl asking Q's could sometimes, if not at all times, be a little civil.. A small response if not a ThanQ would go a long way for the next time one is in a jam..

Check if those two websites give you some help :).
http://softwareabyss.net
http://filesmag.com