The Secret Diary of Hendrik Groen, 831/4 Years Old : Paperback : Penguin Books Ltd : 9781405924009 : : 13 Jul 2017 : Meet Hendrik Groen. An octogenarian in a care home who has no intention of doing what he\'s told. To that end, he creates the Old-But-Not-Dead Club and with his fellow members sets about living his final years with careless abandon. Such anarchism infuriates the care home director but pleases Eefje, the woman who makes Hendrik\'s heart palpitate.