Just decide if you want it in hardcover, paperback, or digital format, and if digital, which device, which app, which font size and which background.

FORBES: Tech Options: Goodbye Living. Hello Deciding.

Book publishers charge extra for readers who are either rich or impatient by releasing the hardcover first, the paperback later.

FORBES: Why do theaters charge the same price for all tickets?

Within a minute or two, Jango produces a list of on-line stores that sell the paperback, hardcover and audiotape.

ECONOMIST: Intelligent agents