Getting Tolkien's birth year wrong in the first chapter, "Daydreaming was a favorite pastime of this little man born in the 1880s" (4). He was born in 1892, a quick google search would have told you this, and "little man" is a bit insulting. Not off to a great start
Reference to the "Kingdom of Forodwaith"
description of the Gap of Rohan as stretching from The Isen all the way to The Anduin
Mention of The River Arnor (doesnt exist) (pg. 147)
Dale is written as The Yale (pg. 164)
Describing the Silmarils as having "phenomenal powers" comparable to the Infinity Stones (pg 170)
According to this book Celebrimbor was an army commander in the Last Alliance (despite being killed almost 2000 years before the War of the Last Alliance) (pg. 171)
Apparently it is The Ring that turns Bilbo into a thief (pg. 191)
Also one chapter claims Gandalf is immune to the corruption of The Ring (pg. 191)
Claim that Mithril blocks the corruption of the ring (pg. 196)
the principle source of happiness for elves is apparently the company of men and dwarves (pg. 205)
Frodo described as a hero, coward, loyal friend, and traitor (when?) all in one sentence (pg. 206)
conflation and confusion of Sauron and Saruman (pg. 208)
Thorin called Thorn (pg. 229)
The One Ring apparently gives the bearer "resistance to pain" (pg. 229)
Elves only live in the woods (news to the Teleri I imagine) (pg. 270)
And particularly egregious is the claim that all humans came from Númenor and since hobbits are most closely related to humans they too have the blood of Númenor. This requires a direct quote because it is so ridiculous, "Therefore, if hobbits are indeed related to humans, they are also descendants of ancestors who lived on Númenor, from whom they inherited certain genetic characteristic before diverging in their turn" (pg. 273).