A massive rip in the fabric of space and time leaves Space command's deep space fleet stuck on the other side of the rift. Meanwhile alien ships from another dimension arrive on Earth en masse on the other side of the divide. Captain Maguire, a decorated graduate of the Space command academy, whose unorthodox approach to duty is also his strength in a desperate bid to defend commands his starship the Sandawana into the rift in a desperate bid to defend Earth. 
Arriving on Earth he initiates the counter attack to repel the alien ships from Earth.  Other starships of  Space command's deep space fleet arrive on Earth to support the Sandawana's fight against the alien ships. Under the vicious barrage of lasers and missiles from Space command's deep space fleet, the alien ships begin to withdraw to their own dimension. But as they retreat the aliens launch a ground operation and take a senior Space fleet officer captive. 
Captain Maguire is forced to pursue the aliens taking the fight to their home world.

Interdimensional, a starship trilogy

"Captain, ship's sensors are picking up violent tremors localized within this area", reported lieutenant Tanaka sitting at the communications console, speaking with a sense of urgency. 


"When did these tremors begin?", asked captain Maguire contemplating in his mind, "what now?" 


As though in response to his thoughts, princess Elantra's voice burst into his mind. 


"Their royal highnesses are awake. I should have warned you that initially that initially upon regaining consciousness they will be in a kind of reflex state of mind. They will be reacting and not in state to be reasoned with. The tremors must be from their starship powering up and attempting to break out from below the surface. They are not waiting for the fleet to start bombarding the surface to loosen it and make it easier for them to break out. 


Nick of time