a suggestion to Vulpes:
study
- "Rethinking the Chess Pieces" by Soltis
- "Secrets of Modern Chess Strategy" by Watson
- minor piece endgames (including NQEs like 2B v. B+N, which can be found in "Practical Endgame Play -- Beyond the Basics" by Flear)
That should give you a rather nuanced view of the relative strengths of the minor pieces.
Knights are the complex mystery key to chess - replace the knights with bishops and have 4 bishops will make for a VERY boring game... 4 knights on each side would be ultra-complex!
The bishop pair in an open game usually dominates - but I have lost a few endgames where I have a bishop and my opponent has a knight and ALL the pawns are on the other colour... 1 knight is worth 1 bishop... but if you have pawns on both sides of the board the bishop will usually outplay the knight - pawns on 1 side of the borad and the knight will definately outplay the bishop