Who can recommend me two good books for self-cultivation

The Four Books and the Five Classics

The Four Books and Five Classics, collectively called the Four Books and Five Classics, are China Confucian classics. The four books refer to The Analects of Confucius, Mencius, Daxue and The Doctrine of the Mean. The Five Classics refer to The Book of Songs, Shangshu, Book of Rites, Zhouyi and Chunqiu. ......