Fiction
To get started, here is a list of some of the landmark reads. I'll add some thoughts soon.
Twilight, New Moon, Eclipse and Breaking Dawn ~ Stephenie Meyer
Stardust, Smoke and Mirrors ~ Neil Gaiman
Never the Bride, Something Borrowed, Conjugal Rites ~ Paul Magrs
The Ninth Circle, Jasmyn ~ Alex Bell
The Sweet Scent of Blood, The Cold Kiss of Blood ~ Suzanne McLeod
Twelve ~ Jasper Kent
The Ruby in the Smoke, The Shadow in the North and The Tiger in the Well ~ Philip Pullman
The Wierdstone of Brisingamen and The Moon of Gomrath ~ Alan Garner
Man and Boy ~ Tony Parsons
Chloe, Sally, Polly, Cat, Fen, Pip, Love Rules, Home Truths ~ Freya North
Ralph's Party, Vince & Joy, A Friend of the Family, Thirtynothing, One Hit Wonder ~ Lisa Jewell
The Wind in the Willows ~ Kenneth Grahame
The Hobbit ~ J R R Tolkein
To Kill a Mockingbird ~ Harper Lee
Space Captain Smith, God Emperor of Didcot and Wrath of the Lemmingmen ~ Toby Frost
The Secret Garden ~ Frances Hodgson Burnett
Black Beauty ~ Anna Sewell
The Red Pony ~ John Steinbeck
Straight Talking, Mr Maybe, Bookends, Jemima J ~ Jane Green
The Rainbow Opera, The Dream Quake, The Vintner's Luck and The Angel's Cut ~ Elizabeth Knox