AUTHOR

Michael C. Grumley

Books by Michael C. Grumley

The Last Monument

Average rating: 6.75

12 ratings

Breakthrough

Average rating: 6.86

7 ratings

Catalyst (Breakthrough)

Average rating: 7.33

3 ratings

Mosaic (Breakthrough Book 5)

Average rating: 8

2 ratings

Ripple (Breakthrough Book 4)

Average rating: 8

1 rating

Echo (Breakthrough)

Average rating: 6

1 rating