The Anatomy Zone (online) is one I like to use for looking up a specific question.
The Anatomy Coloring Book (actual book) is hands down my favorite. The color coding works for me, and the focus required to do the careful coloring helps me to focus. I redo it every 5 years or so.
I’ve never needed any motivation to study. At 7 or so I was reading our family encyclopedia for hours for the sheer pleasure of it. For me it is time and work and family obligations …. so I find I want something absolutely excellent as there is so much I want and need to do with the time I have.