Design & Illustrate Book Interior Pages

I am looking for a designer/illustrator to design 3-5 pages of a book as a mock up (layout, typesetting, illustration) with the potential to design the entire 170+ page book. It is a self-help relationship book that is a cross between a non-fiction book and a workbook. I am looking for line-art type illustrations, info graphics, etc to make the book more appealing and engaging. I have attached some samples from another book by the same author. We would like a similar style but slightly more modern. The book is in English.