I dont remember the title. but its a book about the Falmer and how they became what they are today.
Its just tragic.
http://www.uesp.net/wiki/Skyrim:The_Falmer:_A_Study

My heart broke when I first read it, and it still does. The poor, tragic Falmer.
And there are two books, one that claims Alduin is Akatosh and one that is adamant he is not.
I cant help but feel thats a little jib on us forum go-ers, who have had that discussion for months here.
Yes! That is
exactly what I thought when I read them, as I read both one right after the other. I'm still convinced that that is the case.
As far as my favorite book? I have no idea. I really like Dwarves v1, v2, and v3, as well as Dwemer Inquiries Vol I, II, and III. If we're including every book that has been in TES, and not just Skyrim, I'd say the Egg of Time is my favorite. Every time I look at it I get a sense of wonder and an urge to learn more.
All the books are awesome though, and I am very thankful to all the people who took the time to write such fascinating stories and bits of history about Tamriel and Mundus in general.