Nice finds! B-K is one of my favorites of all time, and that soundtrack is up on my wall. I have one of the original strategy guides as well, but not in nearly as good of condition. I used it a lot as a kid.
Bit of a tangent, but Nuts & Bolts isn't as horrible as I initially perceived it as. I HATED it when I first played it. However, I watched PJ stream it last year, and he convinced me to go back and play it. Not sure if you're familiar, but he has a habit of playing critically panned games at Games Done Quick, and he always has a blast doing so. Seeing him play this game and have fun with it was so charming that I gave it another shot. I ended up having a lot of fun with the game, and although it's not great, it was still a decent game chock full of nostalgia. I didn't finish it because Fallout 76 came out, but I intend to go back and complete it (I was at about 80%).
Also, just curious, what did you think of Yooka-Laylee?