This paperback book is German and a beautiful color, and this is what I found when I Googled it:
This book is titled Gottfried Kellers Weltanschauung (Gottfried Keller's Worldview). It is a German-language book by Alexander von Gleichen-Russwurm, published in 1921.
Book Details
Title: Gottfried Kellers Weltanschauung
Author: A. von Gleichen-Russwurm (Alexander Freiherr von Gleichen-Russwurm, 1865–1947)
Publisher: Rösl & Cie Verlag, located in Munich (München)
Series: It is Volume 23 of the "Philosophische Reihe" (Philosophical Series)
Subject: The book analyzes the worldview and philosophy of the Swiss writer Gottfried Keller (1819–1890)
