"Have you read The Cosmic Serpent by Victor Clube & Bill Napier? " I've read Cosmic Winter by Clube and Napier, Catastrophe by David Keys. My favorite is still Exodus To Arthur by Mike Baillie. (I'm a big fan of these cosmic theories for change)
All of these are in various libraries here on campus and none is checked out. There are 4 books here by Baillie, three having to do with dendrochronology.