The Game of Squash
If you are new to squash, you might want to read the Abbreviated Version first.
If you are already familiar with the old rules, you may want to read An Idiot’s Guide to the New Rules.
For the complete rules, see Singles 2001 Rules (pdf) with changes from 1997 highlighted in bold, or you can see the version without bolding and highlighting (pdf) . There is also an HTML version available.
For more information on lets, see The Interference Line of Thinking.