I feel that Messiaen had three periods. Although this is not something I would have written in a book or something.
1. Post-Debussy style(The Preludes)
2. Middle period(Vingt-regards, The quartet Turangalila)
3: All insanity style, with the birds and even a few pieces with serial style.
Well, yeah, Scriabin and Beethoven were the same way. I think Szymanowski was, also.
Beethoven's works can be divided as such:
1. Early period, Classicalesque (up to about Op.27)
2. Middle period, incorporating Classic and Romantic ideas (the 'Tempest' and 'Appassionata sonatas are examples of this) (up to about Op.90)
3. Late period (lots of Romantic ideas, more chromaticism, and incorporation of Baroque ideas like the theme and variations or the fugue into the new ideas)
And Scriabin:
1. Chopinesque early period (up to Op.20)
2. Middle period (I believe that Scriabin had developed his unique voice by the time he had finished the Piano Concerto. This is shown through some of the 'early' middle-period pieces like the Op.25 mazurkas. Obviously, the 'later' middle-period pieces, like the Op.42 Etudes, are unique in their own way also. In addition, Scriabin started toying with the ideas which would later take over his musical style entirely, while staying in tonality) (up to about Op.53)
3. Late period ('mystic chord', quartal harmony, etc.)
Actually, this gets my brain thinking. Do all crossover composers have (at least) three 'periods' into which their compositions can be divided?
Phil