How does a cement truck mix cement? How are garbage trucks emptied? These are just two of the questions curious children are likely to ask about the vehicles they see around them every day. Fortunately, for those of us who don't know everything (or anything!) about such topics, Dereck Radford has assembled an impressive variety of facts about building machines. The brief text and realistically rendered machines—operated by bustling animal characters—are sure to capture the attention of truck fans everywhere.