Kingdom Come is my favourite comic book novelization...Elliot S. Maggins does a wonderful job of capturing the detail of the graphic novel and makes you feel like you're inside that universe. I'm also fond of Greg Cox's 52 and Infinite Crisis adaptions (not just saying that because he posts here I've stated it before to him, Greg any plans for a Final Crisis book?) and yes the Death of Superman and Knightfall books were good.
Last Days of Krypton was disapointing...I was hyped to read this book and was let down. Everything was just so different than what I was expecting, not to mention it was poorly written. The best book from Anderson that I've read since I've been aware of him was last year's Paul of Dune book with Brian Herbert (affectionately nicknamed Pinky and the Brain by many on this board over the years). I wouldn't reccomend it.