The e-book is now online and available. More information here including links to e-reader software for your Windows or Mac OS X computer.

• App Inventor 2 Graphics, Animation and Charts (Volume 4 e-book and printed book)
  Step-by-step guide to graphics, animation and charts
  Buy e-book from: Amazon, Google Books, Kobo Books
  Price: US$5.99, 227 pages

The e-book includes access to video tutorials that supplement the text. A big thank you to all of you that have found this web site and its tutorials helpful to you and your projects!

UPDATE: Sales of the print version of Volume 4 are being discontinued as of October 18, 2016, due to rampant copyright theft. There are more used copies for sale than the total number of printed books actually sold. Based on sales, readers prefer the e-book version – therefore I am in process of discontinuing sales of the print version. The e-book continues to be available.