It's not about the books you pick per se, but rather about what you draw from them! In a personal statement maybe think about what aspect you found interesting, why, and why you find it important? Also if you can find similarities/ differences in other books you read, and what you gained from this? Hope this helps and isn't too vague 🙂 It might be a good idea to look online for other example personal statements to gauge how they're structured and how people talk about literature in them!