Several years ago a young girl named Neela came in contact with a very learned sage called Haibati baba. The girl’s innocence made Haibati baba teach her various things among which was the art of understanding language of animal world including birds.
The girl grew up to a wonderful housewife who wrote this book down in Marathi in the form of poetry. Pretty much like Bahinaabai.
The book obviously is rare and many people spread rumours about it claiming it banned and people go mad after reading it. The mystery around the book made many crooks publish fake material and sell it as authentic Nilavanti book. The book in fact is nothing to be scared of or has not ill effects on anyone.
Many people forget that a a mantra is just normal sound and unless it is “siddha” mantra it can not impact anything. Thus a child reading some mantra will not affect anything. For mantras to be useful one needs to invest time in learning it and chanting it thousands of times under the guidance of a Guru. Only then the Mantra is able to attract the divine powers to bend the forces of nature. It is not a fast food where you could just read some letters and expect the unexpected.
More details of nilavanti and possible even a downloadable file might be available here: http://marathi.bookstruck.in/d/6-nilavanti-book