In Maniac Magee, what did Amanda discover about the confetti and what did Maniac do about it?

The confetti incident happens right after Maniac Magee successfully unties the infamous "Cobble's Knot." Once he drops the untied knot to the ground, the crowd surrounding him begins to cheer and they start throwing homemade confetti. The whole thing is one big celebration.
 
However, in the midst of the festivities, Maniac's friend, Amanda, realizes that the confetti is actually made from the ripped up pages of her favorite book, the encyclopedia A. Understandably, she's distraught and starts following the paper trail (literally) to the front door of her house.
 
Maniac, of course, feels terrible about this because he knows Amanda's book was destroyed due to the fact that some of the East Enders don't want him in their neighborhood. Although he wants nothing more than to hug and comfort Amanda, he knows that if he sticks around, she'll continue to be harassed. So instead of doing that, Maniac decides to leave town.