The Tower Of Fools by Andrzej Sapkowski

Set in the tumultuous backdrop of 15th-century Europe, the story follows Reinmar of Bielawa, a scholar and healer, who finds himself embroiled in a dangerous web of political intrigue, religious fervor, and personal vendettas. After a scandalous affair leads to a deadly confrontation, Reinmar is forced to flee, seeking refuge in a mysterious tower rumored to house those deemed mad or heretical. As he navigates a world filled with magic, superstition, and the ever-present threat of the Inquisition, Reinmar must rely on his wits and newfound allies to survive and uncover the truth behind the forces that seek to control him.

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