Squash is a popular sport that is similar to tennis. The basic idea of the game is to hit a ball against a wall and have it returned to that wall by the hit of another player. A good racket can make all the difference in a person's squash game. Luckily, it isn't too difficult to select the right racket.
Figure out what level of player you are. If you are just starting out, you'll probably want to opt for a less expensive racket that has multifilament or monofilament strings, rather than a professional-grade racket made with natural gut strings. Pick a racket with larger grommet holes if you are an amateur. Larger holes give the racket more flexibility by allowing the strings to move more, so you'll have better odds of hitting the racket's "sweet spot" and getting better hits. Also look at whether or not the racket has a "closed" or "open" throat. The string area on open rackets is larger, which is better for amateurs. Pick a racket with a wide beam if you are new to the game. A thin beam lets you have much more control over the swing than a thick one, which isn't as good for less experienced players who don't know how to precisely direct their rackets.
Make sure the racket you choose is a good fit for you. If your racket is too large, then you'll have trouble controlling it. Don't rule out rackets that have a poor fit in the grip but otherwise are perfect for you. The grip can be made thicker by putting thin replacement grips and overgrips over the original grip.
Figure out what goals you want to accomplish with the racket. If your goal is to maximise the power of your swing, choose a lighter racket. If you have a fast swing and need to control the ball better, pick out a racket that is a little heavier.
Brand and Price
Buy a racket based on its fit and ability to do what you need on the court, not based on what brand it is or how much it costs. If a cheap racket does everything you want and feels good, there's no reason to spend more just to be loyal to a certain brand. Consider how much you're going to play. If you'll only play once in a while, you should opt for a cheaper racket made from aluminium. If you'll play consistently, spend a little more for one made from titanium or premium graphite.