BiblioVault may have an electronic file which would meet your requirements for this title:
A Quiet Corner of the War: The Civil War Letters of Gilbert and Esther Claflin, Oconomowoc, Wisconsin, 1862–1863
Gilbert Claflin, Esther Claflin, Judy Cook and Keith S. Bohannon
Cloth: 978-0-299-29480-9
Electronic: 978-0-299-29483-0