What is the author's style in The American Language by H. L. Mencken?

Mencken utilizes a chronological approach in the book, beginning with the earliest settlers and their struggle to redefine English to suit their changing needs. He addresses the way in which America's growing population and changing attitudes led to alterations in the language. Addressing modern-day usage, he reviews various parts of speech, demonstrating how each has changed so significantly that stark differences between American English and British English are evident.