It is a familiar sight on the beach or daily commute: readers brandishing a copy of the latest acclaimed work of fiction. But the books people download to the privacy of their e-readers are a different story. A newly published list of Amazon's biggest-selling e-books of the year features psychological thrillers, misery memoirs, Mills and Boon and a book by a British MP whose first work was memorably described by a reviewer as "the worst novel I've read in 10 years".Notably, 18 of the top 20 authors on the list were women, including thriller writers Angela Marsons, Fiona Neill and Rachel Abbott.A parallel list of paper books compiled by British book chain Waterstones for the same period is significantly more highbrow and features four times as many male authors.They include Richard Flanagan, author of the Man Booker Prize-winning The Narrow Road to the Deep North, and Anthony Doerr, with his Pulitzer Prize-winner All The Light We Cannot See.There are also books by Colm Toibin and Ian McEwan.The print list is topped by Harper Lee's Go Set A Watchman, which does not make Amazon's e-list.There is some overlap. Paula Hawkins's runaway bestseller The Girl on the Train, and the latest risqué offering from EL James, appear in the top three of both lists. But the disparity between the books we put on show and those we download suggests that the e-book reads might often be "guilty pleasures". ..