I am from Germany and looking for a family tree about my branch of the Adler family. We once received an offer from a commercial heraldic organization from the U.S. that stated our appearance in a family tree book. We didn't buy it, but I am really interested in further branches of my family tree. The envelope of the offer showed a crest with two eagles and two swords though we carry an officially certified crest that shows two eagles and 4 vertical bars below in black and gold colors.
My dad's name is Gerhard, his sister is Elisabeth Adler and my granddad's name was Otto Adler (I forgot his brothers name -> kids: Hildegard and Hermann, perhaps one more kid that died).
Does anyone own the mentioned book and could send me further information?