My second grade teacher had a bookshelf in our classroom filled with age appropriate books which she let us "check out" and take home. I read every book on that shelf and developed a lifelong love of reading. Nancy Drew books were favorites about fifth grade. Haven't seen anyone mention Zane Grey's books, which I read as a young teen.
As a young adult I fell in love with Gothic novels and read everything Daphne du Maurier wrote. I enjoy historical novels, biographies, etc. For many years I have been a member of a book club in which we read and discuss non-fiction covering many categories. Now have a Kindle - love it! Have just finished reading Francine Rivers' trilogy: A Voice In The Wind, An Echo In The Darkness, and As Sure As The Dawn.