http://www.imperial-library.info/dfbooks/b063_gods.shtml
http://www.imperial-library.info/dfbooks/b055_lightdark.shtml
http://www.imperial-library.info/mwbooks/aedra_daedra.shtml
http://www.imperial-library.info/mwbooks/monomyth.shtml
http://www.imperial-library.info/mwbooks/clanmother.shtml
http://www.imperial-library.info/mwbooks/anuad.shtml
http://www.imperial-library.info/obbooks/shezzardivines.shtml
http://www.imperial-library.info/mwbooks/varietiesoffaith.shtml
Careful what you wish for.
They're in no particular order, the Monomyth however is the keystone. I did leave out most of texts relating to the First and Second Era though, the et'Ada were still much more pervasive in stories then.
Also from the obscure texts:
http://www.imperial-library.info/obscure_text/sporedream.shtml
http://www.imperial-library.info/obscure_text/census_daedra.shtml
http://www.imperial-library.info/obscure_text/5th_era_loveletter.shtml
http://www.imperial-library.info/obscure_text/aldudagga.shtml
http://www.imperial-library.info/obscure_text/tsaesci.shtml
And now you know why they're called the obscure texts.