With respect to content, the 4 hardcover books are identical. PREMIUM LIMITED EDITION (ISBN 9781716957680): Considered the exclusive limited edition. The 8.5×11 in. book is printed on coated ultra-smooth, high opacity 80# (116GSM) bright white paper often used for photo books. The ink used is CMYK premium coloring allowing for high quality illustrations with maximum details showing. The full color hardcover casewrap binding gives the book a professional and highly durable look. HARDCOVER CASEWRAP EDITION (ISBN 9781716971860): A 8.5×11 in, full color option printed with CMYK color ink on standard 60# (100GSM) white paper. Similar to the binding on the premium version, the full color hardcover casewrap binding gives the book a professional and highly durable look. COLOR PAPERBACK EDITION (ISBN 9781096262275): A 8.5×11 in, full color option printed with color ink on 60# (100GSM) white paper. The paperback cover is printed in full color as well. B/W PAPERBACK EDITION (ISBN 9781099893100): A 8.5×11 in, full greyscale option printed with black ink on 55# (90GSM) white paper. The paperback cover is printed in full color.