Forestry

Free to read here, from Project Gutenberg.

Sylva; Or, A Discourse of Forest Trees. Vol. 1 (of 2)

John Evelyn

Studies of Trees

Jacob Joshua Levison, also an audiobook

The Genus Pinus

George Russell Shaw

Wayside and woodland trees

Edward Step, also an audiobook

The Training of a Forester

Gifford Pinchot, also an audiobook

The School Book of Forestry

Charles Lathrop Pack, also an audiobook

Practical Forestry in the Pacific Northwest

E. T. Allen, also an audiobook