A book system comprising: a. a first outer cover having a substantially planar body defining a first aperture extending therethrough; a second outer cover having a substantially planar body defining a second aperture extending therethrough; and at least one inner element located between the first and second outer covers,, the or each inner element having a substantially planar body defining an inner element aperture extending therethrough; wherein at least a portion of the first and second apertures, and the or each inner element aperture are aligned with one another to define a receiving aperture extending therethrough, and wherein the planar body of the first outer cover defines a first edge portion, the planar body of the second outer cover defines a second edge portion and the planar body of the or each inner element defines a third edge portion, wherein the first, second and third edge portions are aligned and engaged with one another to form a spine, characterised in that the receiving aperture is located adjacent the spine; and by comprising b. an item reversible engageable with the receiving aperture, wherein the item is extendable through the receiving aperture to form a closed loop around a portion of the spine, such that the inner elements can be accessed with the item engaged with the receiving aperture. a. a first outer cover having a substantially planar body defining a first aperture extending therethrough; a second outer cover having a substantially planar body defining a second aperture extending therethrough; and at least one inner element located between the first and second outer covers,, the or each inner element having a substantially planar body defining an inner element aperture extending therethrough; wherein at least a portion of the first and second apertures, and the or each inner element aperture are aligned with one another to define a receiving aperture extending therethrough, and wherein the planar body of the first outer cover defines a first edge portion, the planar body of the second outer cover defines a second edge portion and the planar body of the or each inner element defines a third edge portion, wherein the first, second and third edge portions are aligned and engaged with one another to form a spine, characterised in that the receiving aperture is located adjacent the spine; and by comprising a second outer cover having a substantially planar body defining a second aperture extending therethrough; and at least one inner element located between the first and second outer covers,, the or each inner element having a substantially planar body defining an inner element aperture extending therethrough; wherein at least a portion of the first and second apertures, and the or each inner element aperture are aligned with one another to define a receiving aperture extending therethrough, and wherein the planar body of the first outer cover defines a first edge portion, the planar body of the second outer cover defines a second edge portion and the planar body of the or each inner element defines a third edge portion, wherein the first, second and third edge portions are aligned and engaged with one another to form a spine, characterised in that the receiving aperture is located adjacent the spine; and by comprising b. an item reversible engageable with the receiving aperture, wherein the item is extendable through the receiving aperture to form a closed loop around a portion of the spine, such that the inner elements can be accessed with the item engaged with the receiving aperture.