system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why do most books start with at leat one or two blank pages?
gpt
When books are made they are printed on large sheets, which are then folded, bound together, and trimmed. In a normal sized book there will be 16 pages on one sheet (8 on each side). Unless your book has an exact multiple of 16 as the number of pages, there have to be some blanks - and they will usually be arranged so that there are some at the start and some at the end. Sometimes, rather than leaving them blank, they will be used to advertise other books by the same publisher, or by the same author.