These titles in the Journey to the Past: Investigating Primary Sources series (6 titles) investigate a variety of kinds of primary sources related to American history. Individually, the books can feel patchy, more like an annotated list than a unified narrative. Each source is typically covered in one spread, including a large map or photograph, with a general introduction about the source type. In Landmarks, Rajczak treats structures and locations not always considered as primary sources by encouraging readers to imaginatively reconstruct the key events linked to each one. There is a surprising amount of continuity among the books in the series, and using them as a set could enrich study of a variety of topics, from the Louisiana Purchase to the U.S. space program to 9/11. Although these books might be challenging reads, they are potentially valuable classroom or library resources.