DS has chosen two books recently which jump all over the place rather than read from p1 - end. To explain you read the first 5 pages and then it says if you want to follow team X go to page 19, to see what team Y do next go to page 35. These decisions are chucked in fairly frequently and you seem to end up reading most of the book because you will also be sent to earlier pages.
I find the concept strange and frankly a bit annoying but then I'm old.
Why have they adopted this style ? Is it helpful to readers who are just becoming confident?
(I confess one book was Moshi Monsters and the latest Bin Weevils, in mitigation from the library.)