Character Trivia

[The Might]

Ha-ha, I found it! Thing is I was concetrating on books that we know more of, such as those written by Merry, but I realised that it's not really necessary to know what the books were exactly.

As such, the answer seems to be Tar-Elendil (so that's why Elendil was so "warm" ), of whom the following is said in the UT, The Line of Elros: Kings of Númenor:

He was also called Parmaitë, for with his own hand he made many books and legends of the lore gathered by his grandfather.