This category should be assigned to non-fiction books about UFOs and alien abduction, as well as scientific books about astrobiology. For science fiction, see Category:Science fiction novels.
Subcategories
This category has the following 2 subcategories, out of 2 total.
E
N
Pages in category "Books about extraterrestrial life"
The following 29 pages are in this category, out of 29 total. This list may not reflect recent changes.