Quick Search is a keyword search for books, images, journal articles and more.
You can search for book-length biographies in the catalog by searching the name of the philosopher and adding the term biography.
Example: Immanuel Kant biography
You can also search the more general subject Philosophers -- Germany -- Biography to retrieve entries for many different German philosophers.
If you need more books than are available through UNL, try these searches in WorldCat.
Also, see entries in Encyclopedias & Dictionaries tab above.