Forget Me Not by SGC Gategirl
Stargate SG-1 | Season 4 | Long novel, complete

SG-1 return from a seemingly peaceful planet with altered memories and a member missing.

Tunnel Vision by Charli Booker
Stargate SG-1 | Season 7 | Novel, complete

After a visit to another planet is curtailed by an accident, Jack is plagued by increasingly vivid nightmares.

Into the Labyrinth by ELG
Stargate SG-1 | Season 5 | Long novel, complete

Daniel returns to a dig from his past, only to find it the site of some long-buried dark memories, and not the escape from the SGC he'd been hoping for.

Crumpets Aren't My Style by Marz
Harry Potter/Stargate SG-1 | Post-OotP/Season 8 | Long novel, complete

While on a diplomatic mission to London, General O'Neill runs afoul of what seems to be a cult armed with alien technology...

Afterimages by Carter
Stargate SG-1 | Season 4 | Novel, complete

On a routine mission, Jack finds himself experiencing odd mood swings. Then things begin to get strange...

On Trust Alone by BadgerGater
Stargate SG-1 | Season 4 | Novella, complete

Post-"Watergate", Jack has a little difficulty getting home from Russia.

In Retrospect by Charli Booker
Stargate SG-1 | Season 7 | Novel, complete

An accident on an alien planet leaves Jack living a whole new life.

The Cost of Living by Doc
Stargate SG-1 | Seasons 4 | Novel, complete

When Carter goes missing on a planet inhabited by prehistoric tribes, the rescue mission runs into complications.

The Sword and the Sickle by Charli Booker
Stargate SG-1 | Seasons 3-5 | Novella, complete

Jack is ordered to take some highly questionable actions in clearing up a mess made by the NID.

Mind Whispers by Tanya
Stargate SG-1 | Season 5 | Novel, complete

An entity trapped on an abandoned planet has a dangerous influence on SG-1.