In a traditional office, we could buy one paper copy (or maybe a few, for very popular books and/or large teams), and any team member who wants to read it could borrow it to read in their own time. With a distributed team this is not really viable, except for DRM-free books that can be copied multiple times; but we would like to offer restricted books as well.
Can anyone recommend a solution?
If so, just tell everyone the name of it and recommend they check it out. Many libraries these days are also providers of e-books if your team prefers that.