My 18th book is the official user guide for the amazing Gemini PDA, from Planet Computers. The Gemini PDA is the spiritual successor to the legendary Psion Series 5 PDA. Running Android, and able to triple-boot with different Linux distros, and Sailfish OS, the Gemini is a productivity-focused device with a 5.99-inch screen and a full physical keyboard.
You can download the Gemini User Guide from the Planet Computers website, buy the user guide in paperback on Amazon, and for a limited time buy the paperback edition on Indiegogo.
Why is the pdf in color and the book I paid for just black and white. Is there a reasonable reason for that?
It would have been prohibitively expensive printing the user guide in full colour sadly, which is why very very few computer book paperbacks are in colour.