re: The Grateful Dead - What are some good books on this iconic group?

All great must read books. I would also mention:

Bear - Owsley Stanley's biography and;

You Can't Always Get What You Want - Sam Cutler's book. Cutler was the tour manager for the Stones seminal 1969 tour. The book is kind of three parts: its about the Stones tour, how the Altamont fiasco happened, then about him going to work for the Dead afterwards. The Stones left Cutler high and dry facing the consequences of Altamont not the least of which was an extremely pissed off Hells Angels MC. Garcia sort of adopted him and he worked for the Dead for the next four or five years. Tons of insight how the two bands came together for Altamont and then Cutler stepping in to help the Dead regroup in the aftermath and become a touring machine....at that point they were basically bankrupt, facing ruin, and taking loads of shite for their role in Altamont. Cutler organized events like Watkins Glenn, the Festival Express, and put together the Europe 72 tour which is a big part of the book. Great insight into both bands. He also talks about the early London pyschedelic scene and his work with bands like Pink Floyd

Joel Selvin's "Altamont" is the best book written about the subject and should be on your list.