How does Book of Extended Summoning work?

[Asmo]

Do I get the feat Extended Spell permanently, or does the book grant me Extend Spell for one summoning spell only?

Asmo

[Wheldrake]

PRD is your friend.
http://paizo.com/pathfinderRPG/prd/ultimateEquipment/wondrousItems/slotless .html#_book-of-extended-summoning

Short version: it's a one-shot item, and darned expensive, for something that extends the duration to minutes x 2!!!

[HangarFlying]

It says that it works like a metamagic rod, so I'm going to assume that it can be used three times before it is destroyed.

EDIT: Eh, maybe not. The wording is such that it can be used more than once. I wonder if something was accidentally omitted.

[Blakmane]

One spell only.

It's a horrible item.

[Wheldrake]

PRD wrote:

"Once the book is used, it crumbles into cold ash and is destroyed."

Seems pretty clear-cut to me. Get a metamagic rod instead.

If I picked it up as loot, I'd sell it instead of using it.

[HangarFlying]

Wheldrake wrote:

PRD wrote:

"Once the book is used, it crumbles into cold ash and is destroyed."

Seems pretty clear-cut to me. Get a metamagic rod instead.

If I picked it up as loot, I'd sell it instead of using it.

That sentence doesn't mean that it only has one use. It means that after the uses are used up (how ever many that may be—be it one time or more), it is destroyed and may not be reused.