I read Uther after the 4th book of the series. Although I have loved the series so far, this one was more difficult to get throught. The story tell the stories of Uther that we did not learn in the previous books and answers questions that are not answered in the 4th book. Although this book expands on the story of Uther, the pace of the book is different from the rest and it threw me off. I would suggest reading it after the series is complete.