I don't like Mantel either

We do have a couple in the house from a Charity Shop.
But obviously Booth and Fifty have nothing in common. It was only a
bad example of how popular is meaningless. Oxfam built a castle from donated copies and said no more needed. Harry Potters still only last a few days in the local charity shop but they now have six copies of Fifty.
Sorry for bringing down the tone.