Nansubuga Nagadya Isdahl 
Sleep Well, Siba and Saba [PDF ebook] 

Forgetful sisters Siba and Saba are always losing something. Sandals, slippers, sweaters-you name it, they lose it. When the two sisters fall asleep each night, they dream about the things they have lost that day. Until, one night, their dreams begin to reveal something entirely unexpected… With playful illustrations and a lullaby-like rhythm, this heart-warming story set in Uganda is truly one to be treasured.