Fritz is based on various pieces of handlettering done in the early 20th century by Ozwald Cooper, a type designer and lettering artist best known for the ubiquitous Cooper Black. Galapagos Typefoundry's Maiandra (by Dennis Pasternak) and Robusto (by George Ryan) are based on the same pieces of lettering. I think we're all trying to get into Oz Cooper's head, but where Dennis and George found more sharp corners and weight contrast, my interpretation is softer and more text-oriented. In retrospect, I wish I made the italic more cursive and didn't follow the rules of the text weights so closely when drawing the Robusto. It would be more true to the spirit of the original lettering if it had shorter ascenders and descenders and a larger x-height.
Book, Book Italic, Book Small Caps, Bold and Robusto