Camille DeBoer and Sally Bulthuis, employees of Pooh's Corner Book Store in Breton Village, a shopping center in Grand Rapids, Mich., have purchased the store from Baker Book House Company. Effective last month, the two woman are the new owners of the store, which has been in Breton Village since 1976 and offers more than 13,000 titles as well as sidelines. Two other Pooh's Corner locations will remain part of Baker's retail business.