Dan Brown’s scat-illogical* books are at the top of the Oxfam list of books most likely to be donated to the charity, which runs a chain of 686 second-hand bookshops. But the Top Gear presenter my husband David and I most love to hate is the first non-fiction author to make the Oxfam list of “most donated” books. The rants of Jeremy Clarkson, meanwhile, have made the Top Gear presenter the first non-fiction writer to enter the charity’s top 10 of authors most likely to be donated to its 686 shops: either his readers are notably generous, or unwilling to…