Just read all chapters posted to date.
It seems strange that there is an assumption that because the uncle poisoned his wife, ergo he wants to get rid of Leon. We already know about " section 15" of the succession law... this to me, point directly at Constantin, the supposed poisoning of his wife neatly gets rid of Constantin's father, death of Leon would leave almost no option for the succession....
All that said, it is an interesting succession law that allows that the reigning monarch to pick anyone from their family to succeed. Under, for example the British system, Leon, as eldest son of eldest son would automatically be heir, even if his father was dead ( so Willliam, Duke of Cambridge still inherits whether Charles, Prince of Wales predeceases him or not.).
Great story. Wonderful twists. The internal fights Leon/Logan have are really well and realistically written. Looking forward to more!
Thanks