Ben ha-Melekh ve-ha-Nazir · the Prince and the Ascetic

A Hebrew romance made from an Arabic Bilawhar wa-Būdhāsaf: a king is told his newborn son will renounce the world, so he raises the boy where nothing old, sick or dead may be seen; the prince gets out, meets suffering, meets an ascetic, and leaves everything. Twenty chapters of parable follow, and Jewish readers loved it for four centuries.

The Buddha's life, in Hebrew, in Barcelona, in the exact decades the first Kabbalists were writing there — and nobody knew.