My son (22months) loves books, some of his favourites include; each peach pear plum, hairy macklary, emperors new clothes, on the night you were born, what the ladybird saw, and a couple of cheap car/train books. He's totally obsessed with bikes and trains so suggestions with these would be great. We mainly read them together. The ones he prefers to read alone are more learning/picture books or books with sounds.