What has the author Alan Frank Guttmacher written?

It seems you're asking about an author named "Alan Frank Guttmacher." While this name doesn't appear to be associated with any prominent authors, it's possible it's a less known author or a name that's been slightly misremembered.

To help me identify the author you're interested in, could you provide some more information? For example:

* What kind of books does this author write? (e.g., fiction, non-fiction, poetry, etc.)

* What is the author's approximate writing period? (e.g., 20th century, 21st century, etc.)

* Do you remember any specific titles or details about their work?

With a little more context, I can help you find the author you're looking for!