Active toddler

First time Mom here .. I find toddler stage so challenging ! Whenever my LO goes to shopping mall, he will run around, exploring things, touching this and that. When I bring him to the library, he will only browse through at the most 1 book (I read to him).. after that, he is like more interested to run around to explore the borrowing machine, computer, keyboard, table and chairs or just explore the library. I don't seem to be able to get him to take a book and sit down quietly to read :( He just turned 20 months. Is it most toddlers are like that at this age or my LO is too active ??