Oliver’s debut, about one of West Africa’s most powerful and charismatic leaders, delivers a vibrant mix of history and historical fiction for young adults.

The book introduces the medieval empire of Mali with several short narrative essays on trans-Atlantic exploration, trade and mining and soon narrows its focus to the compelling life story of the emperor Mansa Musa, who ruled Mali in the early 1300s. Oliver shows how Musa gained influence while making a lavish, politically important trip to Mecca, and his deft explanation of how Musa crossed the vast Sahara Desert briefly but skillfully conveys the difficulty of the lengthy voyage. This enjoyable work smoothly blends historical text with memorable anecdotes from primary and secondary sources, photos and sketches of replicas of ancient and medieval African art, and well-drawn maps. The book moves at a fast pace, and the author’s clear, straightforward style is likely to appeal to young adults. He easily switches between topics, discussing history (how Musa gained recognition in Egypt and North Africa), religion (how Islam shaped Musa and his empire), architecture (the methods of construction for Malian mud-brick buildings) and fables (the legend of the Malian “gold plant”). However, Oliver always strives for historical accuracy; even his fictional account of a young sandal maker who travels to Niani’s great market contains period-appropriate language and scenery. The book also includes a lengthy glossary that is amply illustrated with drawings and photographs of West African boats and buildings. The work’s one shortcoming is its abrupt ending after Musa returns home; it lacks a thorough explanation as to how and why the empire of Mali eventually dissolved.

A well-intentioned description of life before birth. The illustrations make use of photographs (including ultrasound) and artist’s drawings, often in the same image, and these are well used to clarify the text. How babies grow and develop inside the womb is both described and illustrated, and while the tone is one of forced cheer, the information is sound. Also offered are quite silly exercises for children to experience what life in the womb might be like, such as listening to a dishwasher to experience the sounds a baby hears inside its mother’s body, or being held under a towel or blanket by an adult and wiggling about. The getting-together of sperm and egg is lightly passed over, as is the actual process of birth. But children may be mesmerized by the drawings of the growing child inside the mother, and what activities predate their birth dates. Not an essential purchase, but adequate as an addition to the collection. (Picture book/nonfiction. 4-8)