You're welcome 😉  And yeah, better to wait until the release of built 20.1 before upgrading. I did the same mistake. ... View more

To summarize, try this: - Open InDesign 2025 and save the .indd files in .idml format - Open .idml files in InDesign 2024 and save them again in .indd format - Create the book in InDesign 2024 and add the new .indd files, which should now be visible. ... View more

Before creating a new book in InDesign 2024, you have to save again your .idml files in .indd format.  ... View more

Hi diane_1995, to be able to open a file with InDesign 2024 you must first save it in .IDML format. ... View more