Skin deep

Skin deep is an expression that links outward appearance with a lack of inward depth. In Paul Carpenter’s encounters with Mr Tanner’s mum and his later assessment of his own choices, the phrase shifts from a taunt about superficiality into a broader measure of how fully a person is living.

Meaning and Goblin Appearance

Mr Tanner’s mum uses the language of shallowness to needle Paul about his attention to Sophie Pettingell, casting his behavior as immature and narrowly focused. She then turns the accusation on herself: she presents her attraction as deliberately superficial and describes her beauty as skin deep, while insisting that the appearance is a form she can choose and retain. Her goblin identity does not prevent her from appearing attractive to human men; the scene sets the visible surface against the nature she openly acknowledges beneath it.

The Portable Door and Shallow Experience

After the Ankara incident, Paul continues to set up the portable door at lunchtime but can no longer make himself pass through it. His fear of meeting Mr Tanner’s mum again is part of the hesitation, but he has also begun to question the value of his visits. The door is only about half a millimetre thick, and Paul connects that thinness with the brevity and consequence-free ease of his travels: he can visit exotic places without spending money or time, and without being changed by their food or drink. He sees an uncomfortable likeness between those trips and Mr Tanner’s mum’s pursuit of attractive humans in bars. The comparison makes “skin deep” more than a judgment of someone else’s looks; it becomes Paul’s unease that his own adventures may have offered sensation without substance.

Returning to Ordinary Life

Rather than travel through the door, Paul tries to resume the familiar routine of being Paul Carpenter. He contacts friends he has not spoken to for weeks, meets Duncan and Jenny for games of nomination whist, listens to Neville complain about Microsoft, and returns to frozen pizzas and reading. Yet even this ordinary life seems superficial to him. The expression therefore cuts in two directions: magical travel appears shallow because it leaves little lasting effect, while familiar habits also fail to reassure him that he is living meaningfully. His fear that the shaving mirror might show him a snout and tusks gives that doubt a concrete form, connecting his uncertainty about inner identity with the visible face he expects to see.