Book of Extended SummoningSource Ultimate Equipment pg. 283 Aura strong conjuration; CL 17th Slot none; Price 750 gp (  Lesser), 2,750 gp (  Normal), 6,126 gp (  Greater); Weight 1 lb.DescriptionThis leather-bound book is inscribed with runes relating to
 outsiders and conjuration magic. It enhances spells that
 summon monsters. The user may apply the Extend Spell feat
 to these spells as they are cast. This does not change the spell
 slot of the altered spell. The book counts as a metamagic rod
 for the purpose of combining multiple metamagic effects on
 a spell. A normal book of extended summoning can be used
 with spells of 6th level or lower, while a lesser book can be
 used with spells of 3rd level or lower, and a greater book can
 be used with spells of 9th level or lower. Each book is keyed to
 a particular alignment (equal chances of chaotic, evil, good, or
 lawful) and only works when used to summon a creature with
 that alignment. Once the book is used, it crumbles into cold ash
 and is destroyed.ConstructionRequirements Craft Wondrous Item, Extend Spell, summon monster I; Cost 375 gp (Lesser), 1,375 gp (Normal), 3,063 gp (Greater)
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