The following are some resources for the study of Yoga Vāsiṣṭha:

SANSKRIT: The Yoga Vāsiṣṭha of Vālmikī with the commentary Vāsiṣṭhamahārāmāyanatātparyaprakāśa edited by Wāsudev Laxman Śāstrī Panśīkar

ENGLISH: Yoga Vāsiṣṭha Mahārāmāyana of Vālmiki translated by Vihāri-Lāla Mitra

The Concise Yoga Vāsiṣṭha by Swami Venkatesananda

Liberation and Immortality: Bhuśuṇḍa’s Yoga of Prāṇa in the Yogavāsiṣṭha by Sthaneshwar Timalsina