How many pages is unwind the book?

Unwind is a Science Fiction story by Neal Shusterman. It has 384 pages in book 1. UnWolly is book 2 and has 416 pages. UnSouled is book 3 with 400 pages and the final book is UnDivided which has 400 pages. The series is about unwanted teens being harvested for their parts by the government.