Ernest Hemingway's love of East Africa can be glimpsed in "The Green Hills of Africa" and "The Snows of Kilimanjaro"-- Christopher Ondaatje traveled to Kenya, Tanzania and Uganda to retrace the steps of Hemingway's inspiration for this amply illustrated biography. Ondaatje examines Hemingway's travels with a literary attention to detail, and documents his findings with 98 color photographs, including one of the actual leopard which inspired the short story "The Snows of Kilimanjaro."  (AFR139, $37.50)