Maybe most of you have already discovered this but I came across a VERY helpful improvement regarding floating windows.
first: you can right click on a resource in LIBRARY and it will open a menu with an option for opening that book in a floating window
and: I thought I had found a way to open any tab in an already open floating window, but I can't seem to reproduce that action again. There may be certain circumstances under which this will work, but I don't know how I did it.