Where do we find the teachings of Śrī Chaitanya?
The teachings of Śrī Mahāprabhu are properly described in two book. The teachings regarding the Absolute Truth are described in Śrī Brahma-saṁhitā, and the teachings regarding bhajana are described in Kṛṣṇa-karṇāmṛta.
(Kṛṣṇa-karṇāmṛta Introduction)