Question:  Call Me Dave: The Unauthorised Biography of David Cameron is a 2015 book by  the 74th richest person in the UK, as ranked by what?
Sentence (from "Michael Ashcroft"): Ashcroft founded Michael A. Ashcroft Associates in 1972 and is the 74th richest person in the UK, as ranked by the "Sunday Times" Rich List 2015, with an estimated fortune of £1.32 billion.
Relevant evidence: Yes