Blurb books can have up to 440 pages with standard paper and up to 240 pages with our heavier papers. (110 pages for Layflat books). We count these pages just like you would with any other book, so if you're a visual learner, grab the nearest book off the shelf and take a look.
The following screenshots are taken from our BookWright software. But pages are counted the same regardless of the program you're using.
Page 1 appears on the right hand side of your book on the first sheet of paper.
Pages 1 and 2 are printed on the front and back side of the same sheet of paper. Pages 2 and 3 are also the first page spread (two facing pages).
Pages versus sheets
A 40 page book will have 20 sheets of paper with a front and back for a total of 40 page surfaces.
Minimum page counts
Blurb Photo Book formats and magazines have a minimum page count of 20 pages (10 fronts and 10 backs). Trade book formats have a 24 page minimum. We can't manufacture a book with fewer pages than this.