A coffee table book trilogy on Arunachal Pradesh, titled The Sap Runs Perennial, Ladders to Heaven, and The Wild Green Kingdom, was launched at Vanijya Bhawan, New Delhi, today. The Governor of Arunachal Pradesh, KT Parnaik, along with Union Minister Kiren Rijiju, Chief Minister Pema Khandu, Minister of State for Culture Rao Inderjit Singh, and Vice Chairman of NITI Aayog, Dr. Ashok K. Lahiri unveiled the publication.