There might be some popular 'Abhorsen' mature fanfics out there, but it's hard to say for sure. The popularity of a fanfic can depend on many factors like the writing style, how well it captures the essence of the 'Abhorsen' world, and of course, the maturity level of the content. Some fans might be more interested in the action and adventure aspects of 'Abhorsen' rather than mature storylines. So, it could be that the popular ones are more in the mainstream areas of the fandom.
I'm not sure specifically which 'Abhorsen' mature fanfics are good. However, you can start by looking on well - known fanfic platforms like Archive of Our Own. Just make sure to check the ratings and reviews.
The 'sabriel graphic novel' is likely based on the story of Sabriel. It probably follows her adventures in a world filled with magic and danger. Maybe it shows her using her unique powers to combat evil forces.
The main character is Sabriel. She is a strong and brave young woman who has to deal with a lot of challenges in the fantasy world. She has a special connection to the world of the dead and uses her powers to fight against the dark forces.
One common theme is the exploration of forbidden love. Both Destiel (Dean and Castiel) and Sabriel (Sam and Gabriel) relationships often go against some sort of 'rules' in the Supernatural world. Another theme is sacrifice. Characters are often willing to sacrifice a great deal for their loved ones in these fanfictions.
The 'Sabriel adventure novels' often feature a strong female lead in Sabriel. These novels take readers on a journey through a world that is both beautiful and terrifying. For example, in the story, Sabriel has to use her wits and the magic she has learned to overcome obstacles like the Dead who are rising and causing chaos. The sequels build on the world - building and character development started in 'Sabriel', offering more exciting adventures in the Old Kingdom.
I really like the Sabriel fanfic 'Gabriel's Return'. It has a great story line that involves Gabriel coming back to Sam in a very unexpected way. Regarding Destiel, 'Heavenly Bonds' is a great choice. It goes into detail about the spiritual connection between Dean and Castiel, and how it impacts their actions and decisions in the Supernatural world.
There's a Sabriel fanfic that focuses on their backstories. It delves into how they became the characters we know and love, exploring their past experiences and how those shaped their present relationship.
One common theme is the idea of redemption. Gabriel often has a past full of misdeeds in the Supernatural lore, and in fanfiction, Sam can be the catalyst for his redemption. For example, in many stories, Sam's unwavering belief in the good in Gabriel helps him turn over a new leaf.