Books by Willi Dansgaard
Willi Dansgaard founded the first research group in the world to do climate research based on ice core analysis.
After his retirement in 1992, Willi Dansgaard wrote an autobiograhic book in Danish, Grønland i Istid og Nutid (Rhodos, 2000, ISBN 8772457996). A scanned version of the book is available for download here (but note that the file is ~180 MB) and can be read online here.
Later, he wrote an English version, Frozen Annals, which focuses more on the scientific part of the story. The book can be downloaded as a pdf file.