Abstract: A book page holder device for holding open the pages of a book, the book page holder device having a substantially flat and rigid support member that is sized wider than either a standard sized hard cover book in an open state or a standard sized paperback book in an open state. The support member is formed with two passages spaced apart across its width at a distance that is approximately a width of the open hard cover or paperback book. The book page holder also has an elongated resilient elastic retainer having first and second anchors provided adjacent to respective first and second opposite ends thereof. The elastic retainer is structured to pass through the two spaced-apart passages in the support member, while the anchors are structured to be unable to pass through the same two passages.