Novial is one of the easiest constructed languages, partly because it highly resembles English, which is the actual world language. The multilingual dictionary of 1930, Novial-Lexike, may be in itself a sufficient guide to learn Novial, even though the handbook “An International Language” (1928) should be studied as well.
I have extracted this lexicon from the website http://www.blahedo.org/novial/nl.html , and corrected a few errata.
I have added a brief note from Jespersen's autobiography, concerning the Novial "orthographic" of 1934, which attempted to adopt a more naturalistic orthography, instead of the original Ido-like phonetic one.