I have quite a few art books, I love them, got lots of Yoshitaka Amano books, he's my favourite artist.
Amano books:
Coffin: The Art of Vampire Hunter D
Amano: The Complete Prints
Worlds of Amano
The Tale of Genji
Fairies
The Magic Flute
The Art of Final Fantasy IX
Final Fantasy IX Visual Arts Collection
Final Fantasy 20th Anniversary Artbook
Silence: The Art of Front Mission 1995-2003
Rasenoh (Spiral King)
Genmukyu
Guin Saga
Japan - Final Fantasy
Hiten
Alice
Shinjuku (Actually a short novel but its got Amanos art on most pages)
And wow I honestly didn't realise I had that much until I wrote this list
Other Art Books:
Akira Club
Genga - Katsuhiro Otomo (A recent purchase, it's really amazing)
The Art of Nausicaa
The Art of Howl's Moving Castle
The Art of Spirited Away
The Art of Oddworld Inhabitants (not anime related but the Oddworld games are awesome
)