|“|| Elena: OK, what exactly is a grimoire, anyway?
Damon: It's a witch's cookbook.
Stefan: Every spell that a witch casts is unique unto itself, so every witch would document their work.
Damon: Yeah. Cookbook.
— The Salvatore brothers explains to Elena what's a grimoire in Children of the Damned
A Grimoire is a witch's record of all of her/his spells, rituals, potions, and herbs. It is a spell book filled with information, hexes and spells. There is no original grimoire, they vary in size and contenents depending on the witches who own them.
Throughout The Vampire Diaries series
Bonnie's grimoire was passed down from generation to generation and Bonnie uses her ancestor's Grimoire to learn her craft.Damon placed the grimoire on her grave during Bonnie's Funeral. In Death and The Maiden, Qetsiyah did a spell to make Bonnie the Anchor to The Other Side by using her Grimoire through the process of the spell, the book was magically set on fire to finish the spell but it's unknown if bonnie's grimoire is destroyed.
Jonas Martin's Grimoires Collections
Jonas Martin had an obsession with Grimoires and collected them. Over the years he has collected at least a hundred of them. These were important in finding the spell to channel the power of the dead Witches which will possibly lead to the end of Klaus and to find and save his daughter. After Jonas and Luka died, Bonnie packed up their grimoires and presumably kept from in order to kill Klaus. Bonnie wanted to harness the power of all of the dead witches to kill Klaus but if a witch tries to access that much power it would kill them. When Bonnie finally harnessed the power of her ancestors she nearly brought Klaus to the brink of death, but Klaus told Elijah if he rescued him he would show Elijah where he hid their family.
Emily Bennett's Grimoire
Emily Bennett was a powerful witch in 1864. After she was burned at the stake, her grimoire was taken by the Founding Families, and was later buried in Giuseppe Salvatore's grave. 145 years later, the location of the grimoire was finally discovered by Elena and Stefan, after reading Johnathan Gilbert's journal's. After retrieving the book, Elena and Stefan were forced into giving it to Damon, after he threatened Elena's life. Soon after that, Bonnie and Sheila Bennett were convinced into using the grimoire to try and open the tomb that encased all of the vampires.
During the few episodes when she was still alive, Gloria is seen referring to her grimoire. It's size is found to be bigger than other grimoires shown in the show. Due to her age and experience, Gloria used her powers to scan for a spell without reading anything on it. It may be possible that this grimoire may contain the spell needed to slow down the speed of aging.
Sheila Bennett's Grimoire
This is the grimoire that Sheila taught Bonnie how to perform magic with. Bonnie found this in her gram's house after she and Damon was trapped in May 10, 1994. Probably it's the same grimoire that in the present time Damon has left on Bonnie's grave since the grimorie that Bonnie discover in Sheila's house is the same she had used at the beginning of her practice.
Throughout The Originals serie
Esther Mikaelson's Grimoire
This Grimoire belonged to the powerful 10th century witch Esther Mikaelson, best known for creating the vampire race. Due to Esther's reputation of being an exceptionally powerful witch, this grimoire is very sought after by witches everywhere. It may also be one of the oldest still existing grimoires in the world.
One spell from the grimoire was the untying spell, which used representative magic to untie a knot in a rope and thereby break the link between Sophie Deveraux and Hayley Marshall. It also contains a spell which can return people who have taken posession of another body to their original body once they try to jump into another body again and a spell which can be used to bring people back from the dead without needing their original body. It is also possible, though not yet confirmed, that spells such as the spell that created the originals, the spell which creates daylight rings, the spell which creates moonlight rings and Esther's body jumping spell are in here.
It is presumed that the originals have kept their mother's grimoire with them over the centuries as in the 21st century Elijah used the grimoire to broker a deal with Davina Claire where she would aid him in return for pages from the grimoire. One spell from it was used in Le Grand Guignol by Monique to return Celeste to her original body. It was later also used by Genevieve in the episode The Battle of New Orleans to create the moonlight rings which Klaus wanted to use to build his werewolf army. Davina used it in From a Cradle to a Grave to resurrect Mikael. It is currently in the posession of Davina Claire after she stole it from the Mikealson compound.
- The first grimoire shown in the show was the Emily Bennet's.
- Sometimes they are referred as "Spellbooks".
- The word grimoire came from the old french grammaire meaning an handbook. In Medieval age Grimoires were ceremonial magic handbooks. The most known real grimoire is The Key of Salomon.
- Until now the only grimoire shown in The Originals is that of Esther.
- The largest collection of grimoires belonged to Jonas Martin.
- They can be considered the The Vampire Diaries version of The Secret Circle's Book of Shadows.