You can determine how pages, chapters, and paragraphs are numbered in a book. In a book file, the numbering styles and starting numbers for pages and chapters are determined by each document’s settings in the Numbering & Section Options dialog box or the Document Numbering Options dialog box. You can open one of these dialog boxes by choosing Layout > Numbering & Section Options in the document or by choosing Document Numbering Options in the Book panel menu.
For information on adding page numbering to a document, see Add basic page numbering.
For numbered paragraphs (such as lists of figures), numbering is determined by the numbered list style definition contained by the paragraph style.
The page range appears beside each document name in the Book panel. By default, InDesign updates page and section numbering in the Book panel when you add or remove pages in booked documents, or when you make changes to the book file, such as reordering, adding, or removing documents. If you turn off the setting to automatically update page and section numbers, you can update numbering in a book manually.
If the book is updated and the numbering seems incorrect, the problem may be that absolute numbers are displayed instead of section numbers in General preferences. See Display absolute or section numbering in the Pages panel.
If a document is missing or cannot be opened, the page range is shown as “?” from the place where the missing document should be to the end of the book, indicating that the true page range is unknown. Remove or replace the missing document before you update numbering. If the In Use icon appears, someone using a different computer has opened the document in a managed workflow; the person must close the document before you can update numbering.