Dan Brown: I read the Da Vinci Code expecting some marvel of literature and instead found a badly written pile of cack, with one-dimensional, predictable characters, and a laughable 'plot'. I kept thinking "it's not going to be the Holy Grail, surely it's not..." and when it was I threw the book across the room. Indiana Jones did it first and better.
Jodie Picoult: To be fair she does have a unique talent - she manages to write novels which have different plots and different characters - yet are so incredibly samey you can't actually remember which is which.
Any of the "My Life Has Been SO Much Worse Than Yours" books (I wasn't just abused by my parents, I ended up a prostitute, my leg fell off, my dog got run over, my house fell down, I never got what I wanted for Christmas, and all my clothes are made of Crimpelene)
Any chick-lit, Aga-saga type bollocks.