The British human rights lawyer
Geoffrey Robertson has written several books, but I have only read his account of the trial of King Charles I,
The Tyrannicide Brief. This focuses on the (mostly forgotten) prosecutor in that case, a radical Puritan (his religious views, as with others, strongly affected his actions), who supported many legal reforms that would not occur for centuries. The book is well written, down to earth, and provides useful historical context as well. Useful on various levels, it is well recommended.
