I think Madison Headrick is basically Triss but with blonde hair. Dye her hair red and she's Triss. Even talks like her. She is from North Carolina.
I highly recommend the books as I have written here in the past.
Unlike Game of Thrones, the Witcher books are good from beginning to end and frankly feel longer than GOT because so much happens. And there is more psychological depth in Sapkowski's writing than GRRM. So the main characters (Geralt, Yennefer, and Ciri) are better than any of the GOT characters.
The audiobooks for the Witcher should be free on youtube. They keep on getting uploaded there. I just downloaded them all and went through them in that way. The books provide a satisfying ending as well. But CDPR made the whole franchise even better by rebooting the story and continuing where Sapkowski left off.
After the books, the games are heavily influenced by nearly everything in the novels so people can enjoy them all over again and see things differently and pick up where the myriad book references (in the world building, hundreds of characters, dialogue etc) are coming from. Blood and Wine is a perfect final adventure and most of the fanmade 'Farewell to the White' wolf is satisfying epilogue that connects both books and games. For me it's the best franchise ever due to all these immense components coming together. (books, music, games).