I just released the first volume of a new tutorial series called ZBrush Masters, it will focus on getting top talent artist to show how they sculpt and present their art, it also includes all project files such as Ztools and render presentation PSD files.
For the first volume Mickael Lelièvre will show how he creates his amazing creature sculpts and how he pushes it even further in the presentation.
I will also be joining in and do a bonus tutorial on rendering and presentation.