This is the only magic that all fae have in common. It allows them to look like anyone they want to look like and the illusion is so good that it affects not only human senses, but physical reality.

Mercy Thompson Series #1: Moon Called

• the spell that keeps them appearing human

Mercy Thompson Series #2: Blood Bound

• thanks to glamour, a fae can look like anyone they want to
• glamour is the thing that makes something a fae - as opposed to, say, a witch or a werewolf
• the fae change their appearance by magic–glamour, they call it…not entirely sure that the fae can see through each other's glamour¹²³

Mercy Thompson Series #3: Iron Kissed

• most fae lived among humans under their glamour, even if they admitted what they were
• people are just not ready to deal with the fae's true appearance
• the only thing all fae have in common is glamour, the ability to change their appearance; the illusion is so good that it affects not only human senses, but physical reality¹³
• it's not shapeshifting, but it's as close as makes no never mind¹³
• glamour works best for sight and touch, very good for taste and hearing, but not as well for scent¹⁵
• if glamour has a weakness it is scent²⁸

Mercy Thompson Series #5: Silver Borne

• with enough glamour, a fae can take on the appearance of any living thing, but something inanimate is harder⁸⁸
• their true faces are concealed behind other forms – and designed to blend in with the human race and hide what they truly are¹²⁴

Alpha & Omega Series #2: Hunting Ground

• few of the fae are beautiful with their glamour on; beauty doesn't blend in very well. the fae, like werewolves, spent a long time learning to hide in plain site⁴⁹