Poll: Do you prefer printed books (cost more) or ebooks (cost less)?

Some of my readers have asked about printed copies of my App Inventor e-books.

There are services available that can print high quality, full color (with more detailed images) “on demand” which means a copy of the book is printed and manufactured at the time of purchase.

Printing adds cost. Depending on the size (height and width) and length of the printed book, prices might fall in the range of US$10 to $20.

Are you interested in printed books or are e-books okay with you? Here’s a quick poll on the subject – this poll also appears in the lower right side bar of this web page.

Thank you for your help!

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“App Inventor 2 Databases and Files” ebook now available, 322 pages

For a complete description of Volume 1 (Introduction), Volume 2 (Advanced Concepts) and Volume 3 (Databases and Files), please see my App Inventor 2 e-books page where you can view the table of contents, download a sample chapter, and find links where you can obtain these ebooks online at Amazon, Google Play, Kobo Books and so on.

  • Volume 3 covers TinyDB, TinyWebDB, Fusion Tables, Files and exchanging data with CSV format files.

Volume 3 is a big e-book – 322 pages long, says Amazon’s page counter.

Volume 3 is now available at

Links to all 3 books are available here.

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My Guide to 3D Photography e-book is available from: