Search here
for both
paperback reprints and original hardcover copies. old,
paperback reprints. This search combines results from 1894
and from the 1906 set.
Letters to
a Spiritual Seeker. [Letters between Thoreau and H. G.
O. Blake] Edited by Bradley P. Dean. W. W. Norton, 2004.
Available in both hardback and paperback, with the paperback
still in print.