I have both volumes of "A Wallen/Walling Genealogy" written by Maribell H. Wilder and H. Bruce Wilder Jr. I got these two books several years ago.They are published by Gateway Press, Inc. 1001 N. Calvert St. Baltimore, MD 21202.I contacted the publiser, and they gave me the address of the author, as all the copies were purchased by them!I remember it being a Florida address.The books have alot of information, but there are errors. My line of Wallen's is a mess! However, the books are still very useful. Good luck.