It was a call back to when they wrote about the battle of blackwater bay and said Tywin saved the city. Men of larger stature always get credit for his work. Pretty similar to how it happens in real life.
Bad writing. Sorry, but there is no other answer. What kind of history book could completely leave out any mention of
- a man whose kidnapping started the War of the Five Kings
- a man who served as Hand, second in power only to the monarch, to 2 kings and 1 queen
- a man who was married to the Queen of the North
- a man who was convicted of murdering King Joffrey
- a man who murdered Tywin Lannister, the most powerful man in Westeros?
It's pure and utter nonsense served up for a cheap laugh.
Agreed. Nobody leaves kingslayers out of history books!
And he would go down in history as the official killer of King Joffrey. Tyrion and Jamie were the only ones who were sure of his innocence, and Jamie doesnt seem to have told many people, and nobody would believe Tyrion.
Archmaester Ebrose was in love with Tyrion. He tried to avoid it, but every time he mentioned him, he couldn’t help but writing such things as "the wonderful Tyrion Lannister" or "the beautiful imp".
So in the end to avoid that people realize he is secretly gay, he didn’t mention him at all.
I think it was meant to be a (bad) joke. Tyrion has always had an ego on him and so to leave him right out of the book is kind of funny, especially as he has always been a main character throughout the show.
He's also a kingslayer(at least they believe he is), kinslayer/handslayer, hand of the queen to the crazy bitch that roasted hundreds of thousands, and somehow still got pardoned and once again became Hand of the king.