J. L. Bourne 
Day by Day Armageddon: Shattered Hourglass [EPUB ebook] 

The acclaimed military thriller of the zombie apocalypse from the author of Day by Day Armageddon and Day by Day Armageddon: Beyond Exile!In a desperate bid to take back the continental United Stateswhere hordes of undead now dominate the ravaged human populationa Navy commander leads a global mission to the heart of the pandemic. Task Force Hourglass is humanitys final hope, and his teams agonizing decisions could mean living one more dayor surrendering to the eternal hell that exists between life and death.