Set of 5 vintage Golden Guide books 1950’s earliest (insects) - 1995 latest (pond life). Most are 1987. You might notice there are two for Insects. The yellow covered one (with bugs and butterfly in center) is 1956. The red covered one (with mantis, ladybug, and a third insect centered in a circle) is 1987. Bundles & offers - YES! I have a pair of flower & tree books of the same size and brand listed also. Collect the set? :-D