Version 4 0 has wisely combined multiple volumes of a multivolume book into one resource. This is very useful for encyclopedias and similar works.
Strangely, they have not combined into one resource the book The Text of the Earliest New Testament Greek Manuscripts. This is actually one print volume with transcriptions of many manuscripts. But each manuscript appears as a separate resource and the introduction is yet another resource. it would be nice if all of these manuscripts were combined into one resource with an expandable table of contents for each manuscript.
The same thing is done with the Targum fragments.
I suppose one advantage of the present arrangement is you can compare manuscripts. Perhaps this is why it is arranged this way. But it does clutter up the list of books in the Library.
Also the Introduction of The Text of the Earliest New Testament Greek Manuscripts does not wrap around to fit the window, so you have to do horizontal scrolling to read the very long lines. This makes it unnecessarily difficult to read.