There isn't an e-book or official manual, but I can tell you the basics. It's really fun, but don't expect to be able to just jump in and play.
You'll need to set up a long list of BRIEF questions / clues that you can yell out in about 2 seconds "4x4!" "gimme a verb!" "capital Idaho!" "angrily!" <-- that would be maybe a clue you could give and they have to tell you the part of speech.
You'll need 2 big beach balls (one is just for backup in case your first one rips or something) OR big punching balloons (they are nice and slow coming down.)
Here are the basics, then I'll tell you some suggestions / things to watch out for.
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Hit the ball / punching balloon into the air toward the students. As you hit it, yell out your question / clue. The class has to yell the correct answer back and hit it back up ALL BEFORE IT HITS THE GROUND / desk.
As it goes back up, you yell a new question... on the way back down, they yell the answer and hit it again... etc...
Suggestions:
Set/ break personal records. Have one student sit out and be the scorekeeper-- they will count how many times the class can hit the ball before there is a 'miss'.
A 'miss' is anytime the answer is wrong, no one answers in time, or the ball hits a desk or the floor. (Or the ceiling...or an antique vase... or someone's face... you can call those 'fouls'.)
Give them 2 or 3 rounds, take their highest number of hits and record it on a clipboard or the whiteboard. Next time you play, they are shooting to beat that record.
You MUST train them. Practice, practice, practice before you try to play for real.
Set guidelines such as: No one can get out of their desk to reach the ball... or practice 'Ball-in' where they bat it around, but return it to you IMMEDIATELY when you call "Ball-in!" .
Just training them on these guidelines can take a few days of short practice sessions, and that's ok. It builds the suspense.
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The great thing about this game is that even the kids who don't know the answers get to review because they hear everyone else yell the answer. For those who are yelling the answer AND hearing it, they get double-reinforcement.
Secondly, they'll simply BEG to play if you take them time to set it up and train them. (If you don't, they can get frustrated). This is like having a little party while reviewing the standards.
Warning: You may cry... tears of happiness...