Abstract: An electronic organizer assembly for attaches removably to a host book wherein said host book has a spine, a plurality of leaves or pages, and a plurality of ring members arranged along said spine for loosely retaining the leaves. The electronic organizer assembly has a body portion and a removable insert for removably attaching to the ring members of said host book. The insert has a flange for removably engaging the ring members, and an elongated slide engaging member, e.g., a rod, that extends along the flange. The electronic organizer body has a work panel on a front face; and first and second slotted channels formed at longitudinal side edges of the rectangular body. The channels are profiled to match the slide engaging member.