I've just discovered a peculiar site called Literature Map. You type in the name of an author and it comes up with a map of other authors you might like.
I put in Jennifer Weiner and was recommended Jodi Picoult, Marian Keyes, Anna Maxted, Sophie Kinsella and Helen Fielding (no surprises there!) along with Neil Gaiman, John Krakauer, Michael Crichton and more.
It's not particularly useful and loads of the names are misspelled, but it's strangely compelling to watch. Or maybe I should just get out more ...
