This Is How You Lose the Time War is a short novella about two members of opposing factions (Red and Blue) engaged in a ’time war’: that is they travel in time and attempt to erase each other’s existence. Except that one day Red decides to taunt Blue with a letter, and a correspondence emerges. The book is entertaining by virtue of wit and brevity. However, the elements that are skipped over that end up being more interesting to reflect on later.