I'm looking for a sci-fi book I read a long time ago but can't seem to find it I may have the name wrong.?

The name that I remember for the series was "Felix of the Commonwealth" the FIRST BOOK featured in the far future was about this child who was bought from a slave market on a distant world by this kind old lady who made him her son he was survivor from a program to make espers and later awoke to strong empathic powers when one night a rare snakelike creature called I space dragon (it had wings that it could fold very close to its skin) I think that managed to escape from where it was held was drawn to the boy since the beings of it native land were also espers and shared a symbiotic relationship with the snake like beings joined with him mentally then the people from the organization found him and tried to get he back but failed at the end of the book when he went crazy for a bit and destroyed them. The SECOND BOOK takes place years later when he has better learned to use his empathic ability's and gets hired by this very rich man to help with and expedition to uncover the relics of a long dead race.The THIRD BOOK hes has almost mastered his empathic ability's but still can use his destructive power fairly richer thanks to his now friend the rich guy from the last book paying a lot of money for his services so he set up his foster mother with a comfy life so after hearing strange rumors about his father he went off to search for clues to his birth and whatnot and uncovered a big conspiracy with a cretin race of aliens trying to destroy the commonwealth using mind controlling crystals to kill off important people and incite war and at the end of the book it leaves on a cliffhanger where he gets his own ship and found this race of powerful espers and is going off to find out more about his father. Well that's all I can remember of that series it was really good and it's been many years since it came out so it should be completed please help if you can ;)