This is a good start Krishna: the Beautiful Legend of God: (Srimad Bhagavata Purana Book X) (Penguin Classics) (Bk.10) https://www.amazon.com/Krishna-Beautiful-Bhagavata-Penguin-Classics/dp/0140447997 It is the story of his life. Also read a good translation of the Bhagavad Gita. Eknath Easwaran's version is good, as if Swami Mukundananda's.

I'm a white guy for whom Krishna is God. I talk to him, I do a small daily (well, almost daily) puja in my home shrine, I think of him, I sing and chant along with recorded bhajans, or just listen to them as I'm driving or going about my business at home. I very rarely do japa, only because I haven't established the routine, but I want to. There's nothing magical or mysterious about being devoted or dedicated to him or any other deity.

I don't believe he is part of ISKCON, since although he edited a book about ISKCON he apparently said in that book that his only experience with the movement was as an outsider.

However, there is evidence that he probably does follow Gaudiya Vaishnavism. Bryant is also known as Adwaita Das, per these lectures on YouTube, and internet rumors (unfortunately all I can find at the moment) say he was initiated by Shri Haridas Shastri. He also did a translation of the 10th Canto of Srimad Bhagavatam, which isn't proof of anything in itself...but given how central that text is to Gaudiya Vaishnavas, it may not be an accident that he chose to work on that particular scripture.

So as far as I'm concerned, I'm pretty confident Bryant follows a Krsna Bhakti tradition of some sort. Which suits me just fine as that's my personal tradition as well. :)