The Brook family papers consist of photographs, newspaper clippings, memorabilia, and genealogy notes. The bulk of the collection is photographic material. The majority of the photographic images are of family members but there are photographs of events at Haslett High School and buildings where family members resided. There are six family portrait albums, fourteen cased 19th century photographic portrait images (daguerreo-, ambro-, and tintypes), and over 100 loose photographic images (tintype and print). The albums are mostly undated and of unidentified family members. Identified photographs have been arranged into separate folders. Unidentified photographs have been arranged by size and type.