Four novellas by the most popular Star Trek authors finds the intrepid Starfleet Corps of Engineers called in to fix urgent crucial situations: a distress call, rampaging monsters, a reactor and a city. The Starfleet Corps of Engineers, the top flight of technical specialists, face four of their most challenging missions yet. In THE RIDDLED POST the S.C.E. responds to an urgent distress call from an outpost that has been attacked by something that can penetrate shields. GATEWAYS EPILOGUE finds the S.C.E. facing a horde of rampaging monsters that have been let loose on the planet Maeglin. In AMBUSH, they must fix a reactor crucial to a mining operation, but the malevolent aliens who damaged it are still around. And in SOME ASSEMBLY REQUIRED, the citizens of Keorga are counting on the Corps to save their largest city.