Why the last pages can have nothing on them
A printed book is assembled from more than one page at a time. The printer lays out several pages on a large sheet, prints both sides, then folds the sheet so the pages land in reading order. The folded packet is called a signature. Once signatures are stacked, trimmed, and bound, they form the book’s pages.
That process creates a practical constraint: each signature has a set number of pages. The book’s total page count therefore often needs to fit the available signatures, rather than matching the manuscript’s final line exactly.
When the text runs out first
If the final signature has room for more pages than the text requires, the printer can leave the remaining pages blank. Making a special, smaller final section could complicate production, while adding another full signature would use paper for pages the book does not need. A few blanks are often the simpler result.
The blank pages are not necessarily a printing mistake or missing content. They can be a consequence of arranging and folding sheets efficiently—and they tend to appear at the back because that is where the book’s text ends before the final signature does.
