We live in a world filled with difficult decisions. In fact, we’ve managed to turn even trivial choices – say, picking a toothpaste – into a tortured mental task, as the typical supermarket has more than 200 different dental cleaning options. Should I choose a toothpaste based on fluoride content? Do I need a whitener in my toothpaste? Is Crest different than Colgate? The end result is that the banal selection becomes cognitively demanding, as I have to assess dozens of alternatives and take an array of variables into account. And it’s not just toothpaste: The same thing has happened to nearly...

Starting today, library patrons and Amazon e-book lovers have no reason to needle each other over which source of books is superior. Or at the very least, they have a comfortable meeting place where they can (quietly) exchange both book recommendations and spirited taunting.

As announced in April, Amazon now supports borrowing e-books from local libraries. Library-lent books will work on both Kindle e-readers and Kindle smartphone or tablet apps.

Library books, though temporary, work just like any other Kindle e-book:

When you borrow a Kindle public library book, you’ll have access to all the u...