There’s a new book out for Poser clothing content-creators, How to Make Clothing for Poser: A Step By Step Guide, with 278 pages in 21 chapters. Seems to be written for beginners, since it helpfully explains the basics and technical terms.
A sample page…
Carrara 8 is DAZ Studio's official 'big sister' software.
Carrara loads all DAZ and Poser characters and scenes,
and supports LuxRender for top-quality realistic rendering.