This blog (by Zeev Barkan) is dedicated to the Star of David, its history, its various meanings and usages in different cultures. It includes thousands of pictures of Star of David, six-pointed stars, hexagrams, Solomon's Seals, Magen Davids and yellow badges,and served as a resource for three books and four art exhibitions.
Many Magen Davids appear on the cover of Shulamit Gad's Hebrew book: King David and the Intensity of Psalms, which includes a whole chapter about the meaning of this national Jewish symbol.