DK Tower of Knowledge 16 Mini Fact Filled Encyclopedias Collection Set for ChildrenFrom mammals to minerals and sharks to space, these pocket sized reference books will delight young minds with their array of facts, stats and records. Very visual guides to important topics, these books are peppered with double page photographs highlighting the amazing facts and there is also a data section at the end of each section offering stats including world records and top tens and other relevant information e. g. the Periodic Table in the