Buy Personalized Book To Them

I am thinking to buy personalized gifts to SQ and Kiki. I am trying to train them love book and I think they will be interesting to hear their own story. Therefore, a personalized book that about their own story will be very attractive. I am checking online now, just wonder how many books I should get for them. I do not want them to fight for the books again. So better buy two books for each of them. Haha