You're looking for a comprehensive guide on Suhas Shirvalkar's books, specifically in PDF format, and possibly new or free resources. I'll do my best to provide you with an in-depth guide.

Before diving into his books, let's briefly introduce Suhas Shirvalkar. Suhas Shirvalkar is a well-known Indian author, primarily writing in Marathi, a regional language spoken in India. He is popular for his thought-provoking and engaging writings on various subjects, including spirituality, self-help, and social issues.