İngilizcemi daha da ilerletebilmek için hangi kitapları kullanmalıyım?

First of all, we need to know what is your aims. According to your goals reading materials can be changed.

If you wanna take good exam results in yds or toefl etc, you should read academic essays or articles, but if your aim is just to learn daily life english, you can read stories or novels, especially have situational dialogues.

By the way, instead of reading you had better 😉 try something different. By means of some youtube channels you can improve your reading, listening and speaking skills at the same time.