Sat Sri Akal, I am the grandson of the author Sodhi Harbhajan Singh ji. The book "Bhajan Bandagi Da Pratap" is available with my father in India, and my uncle in Canada. You can reach them by email or phone. Their contact information follows. We are working on an updated website with book excerpts and more information on where to procure a copy. Thank you for your interest.
India:
Sodhi Jas Desh Singh
H-51/A Saket
New Delhi 110017
Phone: +91 9818130441 (mobile)
Phone: +91 1126851089 (Home)
Phone: +1-716-989-4779 (USA)
EMail: jds@sodhis.org
Canada
Sodhi Jagtesh Singh
26, Berkindale Crt.
Brampton
ON L6Y5G1
Phone: 1-905-497-1039 (Home)
EMail: sodhijts@gmail.com
Waheguru ji da Khalsa, Waheguru ji di Fateh.