Indesign 18.5 x64
Windows 10 64bit
Japanese version

Selecting the default format for pdf export of books
Due to the file type being in string order, the interactive format pdf is the default.
It takes a step to select the print-ready format pdf, and one out of two times I accidentally select the interactive format.
I almost never select the interactive format in my work.
That being said, I think some users would prefer the interactive format to be the default, so we should be able to set the default format for the book's PDF output from the settings. Or, I would like PDF export for printing to be a separate menu item, just as PDF export for documents is a separate menu item.

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