Hello, I know this is a very old posting but I reply, though. Hope someone subscribed the follow ups.
I am Hanno Gurski the author of the mentioned EISSLER book. This book is out of stock - I am preparing the next (3rd) edition which will appear in 2015. This is the year I will have done the Eissler genealogy for 30 years.
There are more than 11,000 (by now) persons listed related or connected to Eissler anyhow. But before you readers expect news about the Isler lines I must say: there are no connections to "my" Eissler families coming from Wuerttemberg in Germany.