My goodness - how strange! I've just finished preparing an article on lentils for a magazine and will soon (in the next week) be putting a booklet up on the same on Amazon Kindle! While I can't give you a copy of the article, I'll put here the links where I got my information from. Enjoy the read.
www.drgourmet.com/ingredients/lentils.shtml
happyherbivore.com/2012/06/what-are-lentils/
www.jessicagavin.com/what-are-lentils/
www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert-answers/lentils/faq-20058072
www.bbcgoodfood.com/glossary/lentils
www.realsimple.com/food-recipes/shopping-storing/food/types-lentils
www.whfoods.com/genpage.php?tname=foodspice&dbid=52
I've got another 'keen'... Ouch!