Difference between a preface and a forward?

[theHandpuppet]

Could someone please define the basic differences between a preface and forward of a book? Thanks!

[HamdenRice]

1. A preface is written by the author; a forward is written by someone else nt

[theHandpuppet]

2. Thanks very much!

Much appreciated.

[tomfodw]

3. Not to be (too) snarky, but it's...

..."foreword," not "forward."

(Or is that "nitpicky" rather than "snarky"?)

(No, it's "snarky," because this is not a nitpick - the distinction is important.)