Easy to understand and thorough tutorials/books on PSD-Joomla 2.5?

Hi,

Ive recently started using Joomla 2.5 and I love it. Ive got the hang of the CMS no problem, and also editing already made templates to do what I want through the HTML/CSS.

Now though, what I would like to know is how to create Joomla 2.5 templates from scratch… PSD->HTML5/CSS3 is no problem for me but how do i take the html and convert it into a Joomla 2.5 template?

Cant seem to find any decent tutorials at all out there