I would suspect that you are referring to Monocacy, The Battle that Saved Washington, White Mane Publishing, Inc. 2000. However, the 36th USCT is not recorded in the Order of Battle.
He has also written two other works on the Defense of Washington:
Symbol, Sword & Shield, Defending Washington During the Civil War, ISBN 0-942597-24-9, and
Mr. Lincoln's War, Defenses of Washington, ISBN 0-942597-05-2