Well, some specialized manga and light novel websites might have the Spy x Family novel. But be careful, as not all of these websites are legal. It's always better to go for official sources. Another option could be checking with bookstores in your area. They might be able to order the novel for you if they don't have it in stock already.
The Spy x Family novel has its own charm. While the anime is great at visual storytelling, the novel can be more detailed in terms of the inner monologues of the characters. It gives you a different perspective on the story. For instance, Anya's telepathic experiences are described in a more in - depth way in the novel, which adds another layer to her character.
The Spy X Family light novel is finished. It completed its run with a resolution to the various story arcs and character developments that fans had been following.
You can try some popular manga reading websites like MangaDex or MangaReader. They usually have a wide range of manga available, including Spy x Family.
Well, Spy x Family fanfiction can be really interesting. Some fanfictions might explore different relationships between the characters in more depth. For example, they could focus on the bond between Anya and Loid in a new situation that wasn't shown in the original manga or anime. It's also fun to see how authors play with the spy and assassin themes in unique ways.