Why is there a fourth book in the Uglies trilogy by Scott Westerfield?

Question

I thought a trilogy was a series of three books

Answer 1

haha ya i think inside the book he says that he didnt want it to be a trilogy anymore or something

Answer 2

It started with three, and he was ready to end it, but his publishers paid him for a fourth

Answer 3

It's still called a trilogy, only at the author's site, as you can read through the link below, 'Now, here is the fourth book in the Uglies trilogy: 'Extras'!'

It's like publicity people can't count or something. Weird. ADD: at least it's called 'Extras' in this case. The author has a different take the same story. Extras.

http://www.scottwesterfeld.com

Answer 4

i heard they r pretty good books but havent read it. i guess instead of trilogy its quadrilogy

Answer 5

It's about a diffent character in Japan but Tally comes into the story later.