A book format data package that utilizes dovetail shaped clips to attach trays together and to a book-like cover. The clips have internal living hinges molded between each segment. The book-like cover has a cover, spine made of flexible material, back panel and openings on the spine that are smaller than the resting length of the clips. These openings are a set of two parallel mounting recesses that leave a center strip. This center strip is used to lock the trays and book together. To attach the trays to the cover, the clips are folded to a size less than the size of the openings on the cover. There may be one or more locations to attach clips on the cover's spine. After passing through the opening on the cover and over the center strip of flexible material, the clips are pressed forward and returned to their original configuration. A locking rib is molded into the center of each female dovetail shaped pocket. Each clip has a groove down its centerline that the locking rib fits into.