The Forever Alliance (The Forever, #5)

There is hope, but first you must find it. Jon Ryan has saved humanity time and again. But he is called upon by fate to once again defend his species. As He prepares for an horrific war with the vicious and ruthless Berrillians, a new, more deadly threat arises. A mythical race know as the Last Nightmare enters our universe, intent of destroying it. They have consumed twelve universes in the infinite past they've lived. So far, no force has been able to even slow their conquest. The annihilation of everything looks to be a certainty.
As the last hope to combat the indomitable threat, an alliance is made between old friends and bitter enemies. Every civilization realizes that defeat is so certain that only such a cooperation might stop the Nightmare. Humans are gifted the fantastic technologies to walk among the stars to help in the fight. To be so close to a magical era for humanity yet so likely to perish is a crushing weight. Can Jon pull one more miracle out of his hat?