Literature that is helpful for Sadhakas on the subject of Guru
Directions for Spiritual Practice by Swami Ishwaranand Giri
Samvit Sadhna - A Brief Introduction by Swami Ishwaranad Giri
Collection of Bhajans - Upkrama, Guru Kirtan, Shiv Kirtan, Shakti Kirtan, Hari Kirtan, Vivdh Devata Kirtan, Sadhana Kirtan, Upsanhar Bhajan
Appendix to Samvit Sankirtan Saar
Detailed Pooja Process for Panch Dev, Shri Guru and other Devatas.