Look at the given sentence and add one or two words to it to make it into a well-defined question.
Does the book worth to read?
Is the book worth reading?
Complete the following task based on the instruction and optional input provided.### Instruction:
Look at the given sentence and add one or two words to it to make it into a well-defined question.

### Input:
Does the book worth to read?

### Output:
Is the book worth reading?