International Language by Otto Jespersen
This book was first published in 1929.
Part 1: General
Introduction
History
Part 2: Novial
Novial
Sounds and Spelling
Number
Sex
Neuter
Adjectives
Case
Pronouns
Comparison
Verbs
Prefixes
Suffixes
Particles
Prepositions
Vocabulary
Alphabetical list of hard words
Specimens