Sequence by Adam Moon

The alien collector ship is near the end of its hundred thousand year mission. They have a few specimens left to abduct before they can conduct their grand experiment.

And they're in Earth orbit.

Chris Mathers is a regular bozo in a loveless relationship, living a bleak existence. Little does he know that he'll be chosen by the aliens to travel the stars with them.

He'll get to meet alien life forms from all corners of the universe, fight fierce battles, and ultimately join the alien crew as they fend off attacker's, hell bent on putting a stop to their grand experiment.

But what experiment could be so important that it takes a hundred thousand years to conduct? And why does the enemy want to stop it at all cost?