Hi there! After reading the basic guidelines I hope my question falls in line with this subreddit. I am doing research for a book I am writing and I had been gathering potential sources and going through some of them. I had compiled two books on King George III for my list. The titles are very similar but slightly different and are attributed separately to different authors. However when I actually went and looked through the content the books are identical. They are formatted differently but other than that the words are the exact same. I'm not sure which is authentic or if they both are? How do I determine this. These books both would have came out in the early 1800s. I'll list the information of both books below. Thanks so much in advance to anyone who can give me some advice! :)
Book 1: "The Public And Private Life Of His Late Excellent And Most Gracious Majesty, George The Third, Embracing Its Most Memorable Incidents As They Were Displayed In The Important Relation Of Son, Husband, Father, Friend, And Sovereign, The Whole Collected From The Most Authentic Sources, And Containing A Historical Memoir Of The House Of Brunswick" By Robert Huish, Esq.
Book 2: "The Public and Domestic Life of His late Most Gracious Majesty George the Third, comprising the most eventful and important period in the annals of British history ; v. 2" By Edward Holt, Esq.
According to the Royal Collection Trust website Holt's book came out in 1820 a year prior to Huish's in 1821.
The two works have similar openings, but they are certainly different books with different information, and different authors. For example, Huish's book opens with an extensive treatment of the Hanover line, succession and history up to c. 1700. This is a translation and paraphrase of items from Leibniz's Origines Guelficae published in Hanover in 5 volumes. This covers a significant amount of the background Huish seems to provide over the course of some 150 pages. Holt's treatment of the pre-1760 information is cursory at best. There is going to be a similar treatment of the King, based on what I could see about the authors, as they both tended to take a more favorable view in light of his death.
As a recommendation on where to find good documentation and information on the reign of George III, I would suggest you use Jeremy Black's biography. It's not terribly old, published in 2006), and you would be able to use his bibliography, which would indicate the more important published sources. From what I could see, he only cites Holt and Huish once each.
These were the public access versions I could find easily online:
Huish: https://books.google.com/books?id=rxtNAAAAMAAJ
Holt Volume 1: https://books.google.com/books?id=GT8JAAAAIAAJ
Holt Volume 2: https://books.google.com/books?id=OA-YMZeQAIsC