Clay Golem Page is found in the west most room on Watcher's Keep 4th floor, if you bring it to Cespenar (along with Golem Manual and 5,000 
Gold Piece
Currency in the Baldur's Gate series.), he'll make Clay Golem Manual for you. This summons a Clay golem for 1 turn.
Description[]
| “ | This page appears to be torn from a larger work. Although incomplete, it seems to describe how to summon a golem made of clay. | ” |