I was made better acquainted with Richard II by reading Jean Plaidy's "Passage to Pontefract", her handling of the story of John of Gaunt and Richard of Bordeaux, who became the second of that name on the death of his grandfather, Edward III.
This book was a retelling of the history serially, with little extraneous material. Actually, it was like reading a history book with the characters strengthened into fiction. What characters they were! - senile Edward III and his rapacious paramour Alice Perrers, Good Plump Queen Philippa, the wanton turned troubled Fair Maid of Kent, the ambitious (how many times were we reminded) John of Gaunt, a wonderful and treasured Catherine Swynford, down to the quite complex figure of Richard II. History of course is written by the winners, and the Lancastrians may have exaggerated the depth of this monarch's ineptitude.