Middle-earth Fan Site
https://lotr.fandom.com/wiki/Middle-earth
This website serves as a type of encyclopedia for all things related to Tolkien's high fantasy universe of Middle-earth. Here, viewers can learn about the history and geography of the continent while also receiving background information for the setting of The Hobbit and The Lord of the Rings.
Tolkien's Biography
https://www.tolkiensociety.org/author/biography/
This website provides information about Tolkien's own life, which many consider the inspiration behind Niggle and his long journey.