Gather paper (3 sugar cane + 1 crafting grid = paper)
Gather leather (from cows)
Open the crafting table
Craft books (place 1 leather in the top row center, 1 leather in the middle row center, 1 leather in the bottom row center, and place 3 paper across the remaining slots in the crafting grid to make a book)
Place the book in a crafting recipe that requires it (e.g., book + 2 paper + 1 bookshelf to craft enchanted bookshelves, or book + 3 planks + 2 string to craft a lectern)
For a written book: place a book in a crafting table with ink sac + crafting grid to get a written book
For an enchanted book: use an enchanting table with lapis lazuli and experience, or get one from loot/trading/fishing