books.google.com - First published in 1975, this classic book gives a systematic account of transcendental number theory, that is those numbers which cannot be expressed as the roots of algebraic equations having rational coefficients. Their study has developed into a fertile and extensive theory enriching many branches...http://books.google.com/books/about/Transcendental_Number_Theory.html?id=SmsCqiQMvvgC&q=Further&utm_source=gb-gplus-shareTranscendental Number Theory