I absolutely adore this book. It's very individual, magic has boundaries, it's surprisingly believable for being so fantastic. Nix is wonderful when it comes to writing.
This is a wonderful fantasy novel for tweens and up. There is some non-explicit sexual material, and some violence (including dark images. She is a necromancer's daughter afterall!
This is one of the best books I have ever read and highly recomend it to all other teens my age. Well yeah there's a little bit of sex but thats the way of life. If your religion has issues with death then i highly advise that you do not read Garth Nix's; Sabriel, it won't do you any good.
I believe Matt Berman's review was pretty fantastic. This trilogy is a work of fantasy, and some of the most imaginative fantasy I have read. People who want overt religious allegory will be disappointed, but it has some strong, if vague, theological messages.
It will not seem extraordinarily violent to a child that has read the Hunger Games, but its strong protagonist and emphasis on action centering on something other than hacking and shooting are welcome attractions. Really, one of my favorite books for young adults.
The negative comment that Sabriel drinks alchohol is out of order, the book is set in an alternate European 1920s, and wine wouldn't have the stigma it does today. She drinks it with her meal or something similarly mundane.
The very short sex related bit is indeed unnecessary but it's not a big deal really. Nothin explicit, during her stay at a hotel she hears something through the wall.
I definitely recommend this book to any young readers of fantasy. Sabriel is a great heroine to read about.