One possible fanfiction could be 'The Unforeseen Danger'. In this story, Sherlock and John are on a case chasing a serial killer. While investigating an abandoned building, they are ambushed. John gets stabbed while trying to protect Sherlock, and Sherlock, in his rage to save John, gets a severe blow to the head. But their strong bond helps them get through the ordeal.
There could be. Fanfiction writers are known for coming up with unique and unexpected twists on the original stories. Since 'Dear John' has a strong emotional core and the character of Savannah is significant, a pregnancy storyline for her might be an interesting angle for some fanfic writers. However, not all fanfiction is easy to find, and it may take some time to dig through different platforms to see if there's one out there.
Well, it's hard to say exactly. It could have emerged from an author's imagination or been based on real-life events that were later fictionalized. Sometimes, such stories evolve over time and it's difficult to pinpoint the exact origin.
Fanfiction.net is also a good place. There are many John Sherlock fanfics there. However, the quality may vary, so you might need to read the reviews or summaries before diving in. Some authors on this site have been writing John Sherlock fanfic for years and have a loyal following.
Some smaller, more specialized fanfiction communities or forums dedicated to DC Comics characters might also have great John Constantine x Zatanna fanfictions. You could try joining these communities and asking for recommendations from other fans who are into these characters.
You can try fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. These platforms have a vast collection of fanfictions for various fandoms, and there's a good chance you'll find John and Seraphina fanfictions there.
The communion story in the book of John is usually located in the chapters related to the Last Supper. You might find it by looking closely at those sections.
The setting of John Steinbeck's short stories varies. Sometimes it's in small towns, other times in the countryside. It really depends on which story you're referring to.