I have loads of books that I will read again and again and never tire of them...my ultimate ones are:
Renegades by Shaun Hutson....he has written 50ish books and I have most of them but this is the one I will always return to...my copy is so battered now, but I won't replace it as it is signed by him after I stalked met him. He was disappointingly short but he was very lovely and didn't seem at all disturbed by me, which was nice of him!!!
Nemesis by Jo Nesbo....I only discovered this author a few months ago and am hooked already! He's Norwegian and writes crime thrillers, they are fan-blooming-tastic and keep you guessing right until the end. I can't recommend him highly enough.
It by Stephen King....MrB bought me this when I was preggers with our eldest....it kept me going through many a sleepless night!
Rivals by Jilly Cooper....the perfect book for an easy, fun filled read! Again, I have all her books and this is the most read one, another battered book!!
Angelology by Danielle Trussoni....a kind of antidote to the Twilight saga!! Took some reading but was well worth it. Have read it a few times already and am now ready to read the sequel!!
Elizabeth by Dr David Starkey....I have a mild obsession with the Tudors and have lots of books, both fiction and non fiction, about them and this is one of my faves along with his one about Henry VIII.
I could list loads more, but won't!!!!!!!!