Arendt her book is BS as she only attended about six weeks of the trial, missing most survivor testimonies and the more crucial cross examination (the whole trial took many months). She basically relied on transcripts and her own preconceived theories.

Eichmann wasn't just some bureaucrat but wanted to be seen as just a cog in the system. She basically ate his act and now everyone has to bring her up whenever something evil happens which people seemingly don't seem to care about. In reality Eichmann was a man who had genuine ideology, was personally driven and extremely calculated.

Raul Hilberg holocaust expert is a better source for information on Eichmann, he wrote (one of) the best works on the holocaust and is a genuine historian, was one of the first people to write an extensive history of it . He's not exactly as promoted today (in the media/general public) as actually following his view would poke some holes in the 'holocaust industry' (this doesn't mean that I in any way minimize or doubt the holocaust and its cruelty).