Books are only use­ful inso­far as they serve to start con­ver­sa­tions. Good books are those that remain use­ful long after they’re published.

Cru­cial thing most tra­di­tional pub­lish­ers don’t under­stand? Some books become useful.

How use­ful is an old text­book? An old best-​​seller? An old book nobody ever read when it came out?

Bet the last one wins.