Abstract: A bookmark comprises a device sheet having first and second panels foldable between closed and open orientations. Each panel has an aligned weakened or cut region forming a clasp element manipulatable between a first orientation aligned with the panel and a second orientation extending from the panel. The clasp elements are aligned with one another when the panels are in the closed orientation and are simultaneously movable to the second orientation to create a multi-layer page clasp. Pages of a bound volume can be inserted between the page clasp and an outer surface of one of the first and second panels. A note sheet may be located between the inner surfaces when in the closed orientation. In some examples the note sheets comprise pre-printed matter.