BiblioVault may have an electronic file which would meet your requirements for this title:
Robert Walser: A Companion
Samuel Frederick, Valerie Heffernan, Susan Bernofsky, Elke Siegel, Anette Schwarz, Daniel L. Medin, Paul Buchholz, Peter Utz, Bernhard Malkmus, Jörg Kreienbrock, Kai Evers and Anne Fuchs
Paper: 978-0-8101-3712-7
Cloth: 978-0-8101-3713-4
Electronic: 978-0-8101-3714-1