When I was 14yo I got chickenpox. The one thing you didn't do was wake my mom without sufficient reason. Only recently did I remember that between waking sick with a nasty, itchy rash and telling my mom that I had chickenpox, I checked The Book and diagnosed myself. Hahaha. She felt a little guilty, actually, when I told her that. But I thought it was pretty cool that I could figure it out by myself (yep, I was that kid).
It was later donated and I thought I'd never be able to find a copy: I couldn't even remember the title. But after a few searches on Amazon I found it! Best of all, the edition from my childhood is 1¢ :) Guess whose Christmas came early? lol