"When we think of the personality of Rajju Bhaiya, we recall the words of respected Guruji while he analysed the personality of a Karyakarta (worker). Coal and diamond—both come from the root element ‘Carbon’. When coal burns, only ash is left behind. But a diamond doesn’t burn, it shines brightly. From the point of view of objectivity, both coal and diamond are same. But, from utility and acceptability coal is coal and diamond is diamond.

A karyakarta should be like a diamond. Yes, Rajju Bhatya was an attractive diamond. The ‘life and times' outlined by Ratan Sharda is the life’s journey of this diamond. —Ranga Hari (Scholar, author, senior Pracharak of RSS)

Prof. Rajendra Singh, popularly called Rajju Bhaiya since his early days was a brilliant but helpful, compassionate teacher in Allahabad University; served in RSS at higher levels and finally as the chief (Sarsanghchalak) from 1994 to 2000.

A person with brilliant academic record who could have been a scientist of international repute, he chose to serve the nation. He was a versatile personality with photographic memory, who could tame a mischievous horse, play violine, write songs, even set music for them and sing beautifully in his mellifluous voice.

Rajju Bhatya was an effulgent, ever smiling, humble and publicity shy person who had friends across the political spectrum; a spiritual scientific mind who could see nothing but goodness in every human being. This is an easy flowing account of a life that will inspire every reader.
"

Ratan Sharda
Ratan Sharda has been an RSS member since his childhood and has worked closely with many of the major RSS affiliated organisations as a senior activist. 
An Arts graduate from St. Xavier’s College and Post Graduate from Mumbai University, he has received Doctorate of Philosophy from Hindu University of America, Orlando on ‘Understanding RSS through its Resolutions-Focus on North East, Jammu & Kashmir and Punjab.’
His book ‘RSS360°-Demystifying Rashtriya Swayamsevak Sangh’ is considered the best introduction to RSS now. He has written 'Prof Rajendra Singh ki Jeevan Yatra' in Hindi and 'Memoirs of a Global Hindu' about RSS inspired work outside India. He has translated two major works of Shri Ranga Hari 
on  Shri  Guruji,  the  second Sarsanghchaalak of RSS. Ratan Sharda has mentored many budding writers. He is freelance columnist on various news portals and Organiser weekly, and a well known face on many English and Hindi channels as a senior political analyst.