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

"He taught us to live in harmony with nature, to weave cloth, to make papyrus and to write down records of our way of live", added Mitra. 


"He taught us to understand the change of seasons and number the days, months, years", said Tleka. 


"According to your system of numbering, what century is this?", captain Maguire asked testily. 


"The twentieth forth century", promptly replied Mitra without hesitating. 


"There is only way that is possible, only way that that we can be living in the same time zone with an Earth where dinosaurs still exist?", exclaimed captain Lucinda aside to captain Maguire. 


"What's your theory captain?", asked captain Maguire. 


"The astroid that is supposed to have struck the Earth and brought on the advent of the ice age and wiping out the dinosaurs, never struck. It's the only way that dinosaurs can still be living on this Earth in the twenty forth century", captain Lucinda reasoned. 


Fire mountain