Most of my recreational reading this year has been re-reading, of books I read in my teens and early twenties. It's been quite educational to return to Margery Allingham, Ngaio Marsh, Sue Grafton, Ann McCaffrey and Dick Francis and see how they've held up in the intervening 30 years. Asimov's Robots and Foundation series is/are on my re-read list for 2019, and more Wodehouse, especially Blandings.