I would like to call your attention to Stanley Ginsberg’s rye bread blog, The Rye Baker. The recipes in the site are varied. The geographic region unusually large — from the Alps to the Baltics — and the recipe notation is impeccable.
Stanley has a book, forthcoming as of this writing — The Rye Baker: Classic Breads from Europe and America.
Stanley’s interest in rye began with what in America we call “Jewish rye.” It is a wheat/rye mix, usually yeasted, with caraway seeds. It is far more wheat than rye — a bread that would be unrecognizable in the countryside of Northern Europe where the people who created this bread in America came from. Judging by the recipes posted on Stanley’s blog, his book will be hugely informative.