Books are a useful object class for manipulation: rigid, similar in shape, varied in size and weight, dense when shelved, and sorted by rules (author, subject, height, color) that differ by person. Contributors film themselves sorting a stack and shelving the books, camera steady, faces out of frame, in homes across Southeast Asia, the United States, Europe and beyond. No object, order or action labels are included. The task has clear structure (select, decide, place, adjust) and a clear end state, good for segment annotation and for testing whether a policy inferred the rule instead of copying the motions. The most constrained member of a tidying library with the drawer and general sorting sets, commercially licensed.