N.E.W.T.s (NEWTS) are Nastily Exhausting Wizarding Tests. Hermione Granger, Ron Weasley and Harry Potter are to decide what courses to take. The courses will define their future.

Harry Potter wants to become an Auror. Neville Longbottom's parents were Aurors. Harry wants to follow in their foosteps. To do so, he must score well on the Nastily Exhausting Wizarding Tests.

Harry Potter and the Half-Blood Prince at Amazon.com

N.E.W.T.s (NEWTS) are discussed in Harry Potter and the Order of the Phoenix. This is when Harry discusses with Professor McGonagall that he wants to be an
Auror.

Harry Potter and the Order of the Phoenix at Amazon.com

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