Starfleet Corps of Engineers is a series of novellas set in the Star Trek universe, initially under the title S.C.E. (2000-2006), now under the new title Corps of Engineers (2006-present).

Star Trek: Starfleet Corps of Engineers #33: Collective Hindsight Book 1
" STARFLEET CORPS OF ENGINEERS The da Vinci comes across a strange runaway vessel that is giving off tremendous amounts of dangerous energy. However, the ship is not as strange as they think, as they've encountered it once before... During the Dominion War, the U.S.S. da Vinci encountered this same vessel, and had to destroy it before it presented a danger to an entire star system -- not to mention to the war effort. However, doing so proved a challenge for the ship's first officer and second officer at the time: Commander Salek and Lt. Commander Duffy. Now, over a year later, their successors, Commander Gomez and Lt. Commander Tev, must find a way to destroy a ship that is apparently unstoppable... "

Star Trek: Starfleet Corps of Engineers #34: Collective Hindsight Book 2
"During the Dominion War, Commander Salek and Lt. Commander Duffy of the S.C.E. dealt with a runaway vessel that was endangering a star system -- a mission from which Salek did not return. Now, a year later, Salek's and Duffy's replacements -- Commander Gomez and Lt. Commander Tev -- are faced with the same runaway ship. Facing more than one ghost from the past, can Gomez and Tev succeed where their predecessors failed? "

Star Trek: Starfleet Corps of Engineers #35: The Demon Book 1
" STARFLEET CORPS OF ENGINEERS What begins as a simple investigation of a peculiar subspace signal leads to an errand of mercy, as the da Vinci responds to a distress call -- from the edge of a black hole! Hundreds of years ago, the Resaurians placed a station near the event horizon, forever teetering on the edge of the abyss, and now the S.C.E. must find a way to rescue them. But the black hole, known as ""the Demon,"" contains centuries-old secrets that the Resaurians will kill to protect -- and both the U.S.S. da Vinci and the station may be sacrificed to the Demon in order to preserve those secrets! THE DEMON Book 1 of 2"

Star Trek: Starfleet Corps of Engineers #36: The Demon Book 2
" STARFLEET CORPS OF ENGINEERS Over the years, the S.C.E. team on the U.S.S. da Vinci has solved innumerable problems, and escaped from numerous deathtraps, from the ravages of interspace to the gas giant of Galvan VI. Now, they must enter the outer reaches of a deadly black hole known as ""the Demon"" in order to rescue an away team from a hidden Resaurian prison teetering on the edge of the singularity. But the Resaurians will do everything they can to preserve their secrets, and keep the da Vinci from getting out of the Demon alive! THE DEMON Book 2 of 2"

Star Trek: Starfleet Corps of Engineers #37: Ring Around the Sky
"The Tellarite colony world of Kharzh'ulla is a planet of many wonders, but its greatest feature is the Ring, a massive orbital construction, serviced by a series of ""space elevators."" During the Dominion War, the elevators were damaged by a Jem'Hadar attack. Now, a year and a half later, the elevators have weakened to the point that the entire Ring may collapse, endangering the planet's population -- unless the crew of the U.S.S. da Vinci can save them. But Kharzh'ulla also contains several deadly secrets from Lieutenant Commander Tev's youth. In order for the S.C.E. to save the planet, Tev must face more than one demon from his past... "