There's really not much you can do now that doesn't end in you dieing. As you happen to like being alive, you decide it's best just to wait.
Seconds pass by feeling like hours. Then you hear an explosion.
Though you've only met her once, that does seem to be her style.
"Ah, so she has arrived."
Ruby is about to run right into this guy's trap. However, she could be a distraction for you to do something. You have the Inhuman Speed spell on yourself, and you know your spells require you to point at a target, and can assume your enemy's spells work the same. So, if you keep moving he may not be able to pull off a spell. It's a risk, but you're pretty sure this guy will kill you anyways after he gets what he wants, so might as well take the risk.
"Fire!" You remember this spell from the last time you saw Ruby. Another hole is blown in the wall revealing Ruby standing holding her spellbook.
"Right where I want you." The man speaks, opening his own book. "Inani"
This is your chance! You can't let him get that spell off.
You drop to all fours, and sprint at the man.
"Wha! Inanim"
He turns to cast the spell on you, but not fast enough. You stop right in front of him and kick straight up into his solar plexus.
"Oof!" He hits the ground hard.
However, you remember the threat about the one watching the room, so it's probaly not a good idea to stay to long in one place. For now you continue around in circles, worried at any moment whoever has the Book of Mind may hit you with a spell.
Ruby stares at you, while John just backs away.
"Book of Mind!" You shout. "Watching us! Can cast spell anytime if points."
Ruby seems to get the idea, and opens her book, holding her hand up in the air, and shouts "Lightning!"
Lightning strikes the mansion, amazyingly without setting it on fire, and the power goes out, turning off what lights there were in this room. A bit confused you stop running.
"Why did you do that?" you asked.
"Well. If he's watching us through security cameras, they're off now, giving us some time. Now, do you mind telling me what hte hell is going on?"
"Well."
You explain to her how you got the letter in the mail, your decision to make a preemptive strike, how you met up with John, got the Book of Body, and the whole guy with the Book of Transmutation and his speach about the true powers of the book.
Which brings you to the point, the guy on hte ground, is going to get back up and not be to happy. You should probaly do something about that.