Parents are in poor health. What famous books do you read for them?

Generally speaking, the simplest and most effective way is to recite "Amitabha Namo" or "Avalokitesvara Namo" and arrange a fixed class for yourself every day. You must recite 1000 or something, stick to it, finish it on time, and then repay your merits to your mother.

As for the scriptures, we can look at the Bodhisattva's Tibetan Sutra, which is itself called the Filial Piety in Buddhism. The Bodhisattva Ksitigarbha shows the deeds of a brahmin woman, a light-eyed woman and filial piety. It is with the heart of filial piety that the Bodhisattva develops into "all beings can prove Bodhi as much as possible; Hell is not empty, and you will never become a Buddha. In addition, if this sincere filial piety is read to the mother, it will definitely increase her happiness and longevity.

In addition, give your mother more freedom, make a vow to be a vegetarian and so on. Buddhism is a causal law. You give other sentient beings a chance to survive and plant a long and healthy career. When the results are ripe, you or your mother will naturally feel the results of longevity and health.

In the meantime, you'd better go to the hospital.