I can illustrate complete children's books for clients, along with character design, cover art, book design, and print setup.

My process for books is to start with initial character design for all repeating characters, then once a style is chosen, I create a dummy book of rough sketches. I'll go back and forth with you until the dummy book is what you're envisioning, then move on to the final illustrations. Besides the illustrations, I do the other steps in children's book creation, including the text layout and setting up final files for print at the printing house of your choosing (i.e. Amazon, Ingram Sparks, Lulu etc.) 

I can do full-page illustrations, spot illustrations, or a mixture of both. 

I do my digital illustrations at 300dpi in Clip Studio Paint, and then do the book layout in InDesign.