[vbob]

I've been using Calibre for my casual reading for some time, and realize it's a much deeper and more useful tool than I have taken advantage of so far. Now in retirement, I find myself juggling multiple versions of technical documents, where I almost always want to study the most recent, but would like to have the others only slightly hidden. Does Calibre offer a mechanism for keeping older document versions near at hand but not on main 'shelves' much as a paper library would use the 'stacks'?