Eva, it's your turn

Eva, what did you think, that you would be the only person to write enigmas? If you thought this, you were so mistaken...!

Now, it's your turn. You have to answer my enigma.

My enigma is:

"It is a pseudohistorical account, it chronicles the lives of the kings of the Britons in a chronological narrative spanning a time of two thousand years. It has little value as history but is a valuable piece of medieval literature. It counts a beautiful history"

I want:

• The name of this book (Real name and English name)
• The person who wrote this book
• The year of this book
• And what tells this book

I wait very impatient for your answer...