The Amduat is an Ancient Egyptian funerary text dating back to the New Kingdom. It was used exclusively for the guiding of pharaohs through the underworld. Serqet appears in the Seventh Hour, holding down the snake Neha-hra (i.e., Apep) with a chain or rope. This is all part of the elaborate spell that the deceased pharaoh must recite in order to help free Osiris from the snake and earn an eternal place on Ra's sun boat.
The Book of Gates is also a New Kingdom funerary text (it might be from before then, but that's up for debate). It was used mostly for nobility and royalty, but some parts were merged with the Book of the Dead (which is the funerary text you've probably heard of). Serqet is found in the descriptions and depictions of the 10th Gate of Duat, stretched across a chain near Apep's head.
Yu-Gi-Oh was all the hotness in the '90s. The card game is in the same vein as Pokémon and Magic: The Gathering, but is heavily inspired by Egyptian images and themes. The game has a couple of cards named for Serqet: The Seal of Serket and Mystical Beast of Serket. We can safely say that the picture on that second card is of the gnarliest scorpion you will ever see.
The goddess Serqet is a character in the Kane Chronicles series by author Rick Riordan. This whole series is about Ancient Egypt—except the gods are transplanted to modern day places like Manhattan and there are some magical kids involved. The author's very creative description of Serqet includes her having mandibles in her mouth. Creepy.