Update Book panel
Please update the Book files to work more like FrameMaker.
For example, one can group files together, use folders (to treat separate files as one chapter), set the pagination settings separate for each file (start on right, start on next, make page count even, etc.)
InDesign hasn't had any major long document feature updates for some time. (Endnotes doesn't count as a long document feature since they do not currently work for a book. <g>)
Yoong Hor Meng commented
It may not make financial sense to implement feature from one product to another product. However, if they do, it would be beneficial to the publishing industry - to use just a few software to do all the works. FM is not in CC.
The book feature in FM is really good and flexible.