McFarland & Co., Inc.
Lawrence Abel's book, Lincoln's Jewish Spy, is an "enjoyable read, artfully presenting this eccentric Victorian gentleman in his odd natural habitat, among the feet of the famous."
"Lincoln’s Jewish Spy: The Life and Times of Issachar Zacharie,"
Civil War Book Review: Vol. 23
Available at: https://digitalcommons.lsu.edu/cwbr/vol23/iss1/13