Gadding with Ghouls is one of the books written by Gilderoy Lockhart. It is a required textbook for the second year ; as such, it cannot be gifted. It can be purchased at Flourish and Blotts for five Galleons.
From the Story
"Gadding with Ghouls by Gilderoy Lockhart is one of the books Lockhart assigns to students in his Defence Against the Dark Arts classes."
"Gilderoy Lockhart explains how he trapped a ghoul using only a tea-strainer."