What has the author C R F Maunder written?

You're likely thinking of C.R.F. Maunder, a British astronomer who lived in the late 19th century. He was known for his work on sunspots, particularly for identifying a period of low sunspot activity, now known as the Maunder Minimum.

However, it's important to note that C.R.F. Maunder did not write any books or fiction. He was a researcher and observer of the sun. His work is primarily found in scientific journals and publications.

Here's what you might be looking for:

* "The Sunspot Cycle" by C.R.F. Maunder (1890): This is a seminal work in the study of solar activity and sunspots. It's a scientific paper, not a novel.

* Books and papers discussing the Maunder Minimum and C.R.F. Maunder's contributions are available.

If you're looking for fiction, it's possible you've confused C.R.F. Maunder with a different author. Please provide more information if you can remember any details about the author or the work, and I can help you find it!