There are at least 20,000 doors

for a full day close any door you open as quietly as possible

There are at least 20,000 books

find a book you have not read. open it at a random page

read aloud the first sentence you see

ff you see the middle of a sentence go back to the beginning of the sentence

read nothing else

once you have finished your randomly selected sentence close the book

decide if the sentence made you want to read the book

if it does

read it

if it does not

do not read it