Brain Chase hid a key inside a book at a Houston public library for a chance to win some cash. Alina Frey, 14, discovered the key on May 25 at the Meyer branch library.
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Houston's Library Challenge Riddle was posted on the Brain Chase website on May 23. Sign up for the solution to the riddle at Brain Chase.
RELATED: Kids can win Astros tickets and more just for reading this summer
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