Your Not-So-Permanent Library?

Leaving books to descendents upon one’s death is no big deal. But as The Wall Street Journal points out, it’s a trickier legal matter -- at least for the time being -- to hand down e-books:
Someone who owned 10,000 hardcover books and the same number of vinyl records could bequeath them to descendants, but legal experts say passing on iTunes and Kindle libraries would be much more complicated.