Deletion of Dhyanalinga

Comment: Found a couple of book mentions:https://books.google.co.uk/books?id=2QCFAwAAQBAJ&pg=PA94&dq=dhyanalinga&hl=en&sa=X&ved=0ahUKEwjq1_yBsK_fAhUmRBUIHX9vAU0Q6AEILzAC#v=onepage&q=dhyanalinga&f=false 1, https://books.google.co.uk/books?id=EnAsAQAACAAJ&dq=dhyanalinga&hl=en&sa=X&ved=0ahUKEwjq1_yBsK_fAhUmRBUIHX9vAU0Q6AEIJjAA 2 but they are written by either the Isha Foundation or the Sadhguru himself; so therefore primary. Fails 
Stance: delete
Cited policy: Wikipedia:Notability (WP:GNG)