I'm rereading Storm Front right now, and here is some stuff I found out that has happened before Storm Front.
page 4. "My only job had been the previous week, when I'd gone down to Branson, Miissouri, to investigate a country singer's possibly haunted house." (It wasn't haunted as we all know

)
page 62. "Mike is a super mechanic. He never asked questions about the burns that slagged a hole in the front hatch or the claw marks that ruined both doors."
page 68. "You don't know what I went through to get it."(name of Toot Toot)
page 94. ""Don't I always make the potions like you say, Bob?"
"What about that diet potion you tried?"
"Okay. That one was a mistake."
"And the antigravity potionm remember that?"
"We
fixed the floor! It was no big deal!""
page 99. ""I don't take chances in getting potions mixed up anymore, ever since the invisibility/hair tonic incident, from when I was trying to grow a decent beard."