Gail Jarrow's "Lincoln's Flying Spies"
View attachment 127084 107 pages with lots of pictures. THE BEST BOOK for ALL AGES on Balloons in the Civil War. Covers both the Union and Confederate use of aerial observation.
Charles Evans "The War of the Aeronauts"
View attachment 127085 similar to Haydon's book (below) but easier to read.
Stephen Poleskie's "The Balloonist"
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or if you really want to get technical . . . the CW Ballooning Bible is "Military Ballooning During the Early Civil War"
by F. Stansbury Haydon
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Respectfully submitted . . . . .