Bookmarks can include a base that can couple with a cover of a book and a ribbon that can be attached to the base. For some bookmarks, the base includes a display body that can be positioned at an exterior of a cover of a book when the bookmark is coupled with the book, and also includes a rigid body coupled with the display body such that the rigid body can be positioned at an interior of the cover of the book when the bookmark is coupled with the book. The rigid body can include a coupling assist region having a cavity that extends rearwardly relative to the display body. An edge of a book cover can be received into the cavity before being advanced between clamping portions that are defined by the display body and the rigid body.