You need to decide if you want to build your Easy DIY Murphy Bed out of Plywood entirely, or a combination of plywood and particle board. Particle board may be slightly less expensive than plywood.
However, plywood is a much better choice and it is stronger. Plywood is also better if you want to stain your DIY Murphy bed and add certain custom finishes to the wood.
Book number 1 in our 3-guidebook set is “The cutting guide and the items list” as the name indicates you will find all the measurements to cut the wood for the size of the wall bed your purchase.