Diadem #9: Book of Reality, by John Peel
It's Pixel's turn to return to his home planet of Calomir, a world where the citizens live in Virtual Reality. Pixel wants to introduce his girlfriend and fellow magic-user Jenna, to his parents.
Only...there's one little problem with that. When the gang arrives on Calomir, they learn that Pixel's parents are missing. When they start to search for the missing adults, the four are soon split up and in dire straits. Jenna and Pixel are captured by the Overmind, a computer virus that's taken over the planet, and Score and Helaine are sent to the slave camps.
I really really enjoyed "Book of Reality." The idea of the Overmind was pretty interesting, and a little scary too.
As is his usual, Peel ends this book on a cliffhanger, and wow! I rushed for the next book to see what would happen next, because I definitely didn't see the plot twist coming.
5/5.