Akilathirattu Ammanai Full Version is an educational book written by Ayya Hari Gopalan and inspired by Ayya Vaikundar. The book talks about the avatars of Lord Narayana and the creation of the world. Ayya Vaikundar is the manifestation of Lord Narayana, who came to earth to advise people to purify their minds for the upcoming Dharma Yuga. The book describes the seven avatars of Lord Narayana and how he saved good people from the Asurans in all yugas.

The book also includes stories from Ramayana, Mahabharata, and other religious texts. Akilathirattu Ammanai Full Version is a must-read for those interested in learning about Lord Narayana's avatars and the creation of the world. The book is available for free on Android and can be downloaded from the developer's website. However, the book is not recommended for those looking for a quick read as it requires time and patience to understand the complex concepts presented in it.