The queen endings are queen vs rook and pawns, and there are plenty of knight endgame principles that are needed other than basic endgame principles.
No they're not. Since you have the book, read starting on page 420. (Hopefully our page numbers are the same.)
here is my failure of trying to draw rook +3 pawns vs rook +4 pawns
Also we played the time control 30 + 2.