https://fromtheheartofeurope.eu/to-rule-in-amber-by-john-betancourt/

Third of the four books in the prequel series to Roger Zelazny’s Chronicles of Amber, by the much less gifted writer John Betancourt. Oberon, our hero, starts to put together a governing regime for Amber, the new magical centre based around the mysterious Pattern. I confess I had lost track of all of his brothers and sisters, and they are pretty indistinguishable as characters – apart from the one who is obviously going to perpetrate a sudden yet inevitable betrayal, and duly does so. Unnecessarily confusing that there is a princess called Blaise here and the original Chronicles had a prince called Bleys. ( )

http://blog.worldmaker.net/2007/jan/18/books-moment-betancourts-amber-prequels/ ( )