One Zentangle a Day, by Becka Krahula
This book is a 6-ish week course in Zentangle. I am getting through it in my own leisurely way, but I am really enjoying it.
I love the way the book is laid out, each 2 page layout is one day, each chapter is one week (-ish).
And it is just a beautiful book. Not to mention the detailed explanations of all things zentangle. As you go through each chapter, you are building your zentangle skills.
Tangellations, tangle enhancers, shading, tone, how to draw the eye through your zentangle.
An idea gallery in the back, and tons of examples throughout the book.
If you are interested in zentangle and don’t know where to start, I highly recommend this book as a great guide to the world of zentangle.