Otto Jespersen 
Novial Lexike [PDF ebook] 

First published in 2006. Novial (NOV – new, International Auxiliary Language)is one of the easiest constructed languages, partly because it highly resembles English. The multilingual dictionary of 1930, Novial-Lexike, may be in itself a sufficient guide to learn Novial. The reader will find : (1) an introduction showing the urgent need for such a language, (2) the history of the movement with criticism of earlier proposed artificial languages, (3) a detailed grammar, in which, chapter by chapter. the reasons are given that have led to precisely those and to no other forms , (4) the scientific principles of word selection, and (5) some specimens intended to show the use of the language for different purposes and in different styles.