Add spaces: AnotherhighlyrecommendedreferenceisTheBigRedBookofSpanishVerbs:555FullyConjugatedVerbs.Imadeanefforttoworkthroughthisonefromcovertocover.
Another highly recommended reference is The Big Red Book of Spanish Verbs: 555 Fully Conjugated Verbs. I made an effort to work through this one from cover to cover.