A book and a cup of tea or coffee is the best gift you can give yourself, and self-love at prices that don’t pinch is what the Big Billion Days sale is all about! With discounts, deals and unbelievable offers up for grabs, now’s a great time to replenish your bookshelf. Take a look at the top 12 books to buy this Big Billion Days sale and ones that you can pre-order at a discount too.