Portal

Sequel to Threshold, Book Three in the Boundary series.

An exploratory mission to Mars and beyond begets a rush to gain control of advanced alien technology — even if it leads to an interplanetary war.

Stranded on Europa: Madeline Fathom miraculously crash lands the crippled Nebula Storm on Europa with the surviving crewmembers of an ill-fated EU vessel landing nearby. Help is most definitely not on the way. Escaping a trap of mysterious alien technology — then using it to her advantage — is Madeline’s only chance to escape a very frosty demise on a very lonely moon.