Bizarre & Ornamental Alphabets, edited by Carol Belanger Grafton (New York: Dover Books, 1981); and Decorative Alphabets and Initials, edited by Alexander Nesbitt (New York: Dover Books, 1959). Both books originally sold for $4.00 or less, and you ought to be able to find them on eBay or amazon.com.

There's a book called Alphabets printed by some french library that has a lot of decorative initials, its very recent (2000), 384 pages and its very easy to find, altough I'm not finding any link to it right now. :(

Emiliano Amadei

http://www.abebooks.com/servlet/BookDetailsPL?bi=683100827&searchurl=sts...

I have a copy of this book, it's really good as refference.

Emiliano Amadei