I use multiple different art books. And sometimes I’ll just find internet references. And make a ton of Art. Here are some of the ones I like to use, how to draw manga by Ruth Keattch, and the master guide to drawing anime by Christopher Hart. I’ve made some really interesting art pieces with following these books. And looking through these I can just reference back to how to draw my own and make my own. Here is one of the art pieces I am very proud of making referencing back to these books.