Your puzzle is on page 22 of the book. Open one hint at a time: often the first one is enough.
Read the riddle on the frosted glass. A small mirror helps, but it is not necessary.
Check your answer
Nothing is revealed if you are wrong.
First hint
The text is mirrored. Hold the page up to a mirror, or read each word from right to left.
Second hint
It holds a flame, has a handle, and lights the path at night.
Solution
The riddle reads: "I keep a little fire inside a house of glass. Swing me by my handle to light the way you pass." A flame in a glass case with a handle: the answer is LANTERN.
The same hints and solutions are printed in the book (pages 56, 58 and 60).