The Glamis Curse is a "coming of age" novel in which the lives of Michael and Judy, red squirrel twins struggling to grow up in the gray squirrel world of Manhattan's Central Park, improbably cross paths with those of Lucinda, an orphaned lass, and her magical knight guardian Sir Edgar, who have fled there from the Scottish Highlands.
Michael's and Judy's parents, descendants of Highlands squirrels landed in the wilds of the Park's North Wood, bore the twins in late autumn, past the gathering season, but despite the gray squirrels' predations their father has managed to larder food enough to keep the family into winter.
Lucinda is descended, in the fortieth generation, from Macbeth, Thane of Glamis, the trusted General beguiled by witches to murder his King. For his crime, Macbeth's descendents were cursed to live in villainy and die unmourned, and so they have until Lucinda. Born virtuous and full of grace, the witches swear an oath to maintain the Glamis Curse by snuffing out her life.
Seeing this in a vision, Sir Edgar flees with Lucinda to Central Park, and the witches follow. There, the twins' father, foraging for nuts late one December night, is trapped by a hag of inhuman repugnance-- one of the pursuing witches. Sir Edgar frees him but in so doing reveals to the witches Lucinda's presence and unwittingly ensnares the father and his family in the witches' blood oath.
While Sir Edgar cannot convince Lucinda of the danger she faces, he is determined to protect her from it, and in the end he does, but only with the aid of Michael and Judy and the entire squirrel nation of Central Park that closes ranks around them.
Set in the magical venues of Central Park amid its fascinating inhabitants, animal and human, it's a book made for parents and kids (or teachers and students) to read together, with literary and philosophical dimensions meant to promote dialogue and press its youthful audience to explore beyond their present experience and extend their horizons as they morph toward adulthood.