McKenzie Wark - Dispositions (2002)
Direct link
Though not public domain the book has been shared by the author. Wark is a media theorist and writer possibly best known for The Hacker Manifesto (with two books on the Situationists for Verso). In Dispositions Wark travels to places using his GPS then records observations and thoughts. It's an unusual mix of psychogeography, prose poem and criticism.