Yes, HOOKS is a Scrabble word!

Letter values in Scrabble US: H 4, O 1, O 1, K 5, S 1.

Is it a valid word?

HOOKS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

large strong hand (as of a fighter)
a catch for locking a door
a sharp curve or crook; a shape resembling a hook
anything that serves as an enticement
a mechanical device that is curved or bent to suspend or hold or pull something
a curved or bent implement for suspending or pulling something
a golf shot that curves to the left for a right-handed golfer
a short swinging punch delivered from the side with the elbow bent
a basketball shot made over the head with the hand that is farther from the basket

fasten with a hook
rip off; ask an unreasonable price
make a piece of needlework by interlocking and looping thread with a hooked needle
hit a ball and put a spin on it so that it travels to the left
take by theft
make off with belongings of others
hit with a hook
catch with a hook
to cause (someone or oneself) to become dependent (on something, especially a narcotic drug)
secure with the foot
entice and trap
approach with an offer of sexual favors

Also: meat hooks, come-on, hook shot, knock off.