I am afraid my taste in reading material might bore you, dear Inspector! I am, as you know, a humble scientist, and am prone to waste my free hours with my nose buried in some dull textbook on medicine or chemistry. My personal library is filled with nothing but the stuff, so I find it kinder to leave that particular room out of house tours… .
(Jekyll questions are fun to answer because he is rarely truthful! He secretly adores adventure stories and I thought it would be a cute little wink-wink-nudge-nudge if his favorite book of all time were Treasure Island. Which was published when he was well outside the intended target age.)