I'm not sure which specific story Gandalf is telling as there are many in the Tolkien's works. Maybe it's about the history of Middle - earth, like the battles against the dark forces or the tales of the rings.
Well, Gandalf is from the Ainur. He was among those Maiar who were sent to Middle - earth. His purpose was mainly to help the good against the forces of evil like Sauron. He was created long before the events in Middle - earth started to unfold. Gandalf's origin story is deeply intertwined with the greater cosmology of Tolkien's world. He had powers that were both magical and related to his wisdom and knowledge, which he used to influence the course of events in Middle - earth.
Gandalf originated from a higher spiritual plane. He was dispatched to Middle-earth with a purpose. His background involves being part of a divine order and having a responsibility to bring hope and resistance against evil.
I haven't read this novel specifically. But generally, in Tolkien - related works, Frodo's encounter with the Black Riders is full of suspense and danger. The Black Riders are terrifying foes, representing the power of Sauron. Frodo's journey in such a context often involves a test of his courage and the will to resist the dark forces.
No. Writing fanfiction that involves sexual content related to characters from established works is inappropriate. It violates the integrity and intended nature of the original characters and stories. It also may not be suitable for a wide audience and can be considered disrespectful to the source material.
Fanfiction can also offer them a chance to relive their experiences in different ways. Maybe they enjoy seeing how other writers imagine their thoughts and feelings during the journey to destroy the Ring. It could also be that they like seeing their friendship explored more deeply or from different angles in these fictional works.
A lot of 'female Frodo fanfiction' has the theme of changing the narrative. It's not just about gender - swapping Frodo, but also about changing the story's direction. Maybe she makes different choices along the journey, leading to different outcomes for Middle - earth. This can include things like forging new alliances with different races or finding alternative ways to destroy the ring.
Frodo ends up going to the Undying Lands. It's a mythical place beyond the mortal world. His departure is a way of finding solace and leaving behind the troubles he faced during his quest. Many believe it's a fitting end for his character.