This Is How You Lose the Time War

This book is so beautifully written. The temporal espionage quietly simmers underneath the back and forth between Red and Blue. As the book progresses, Red and Blue's familiarity with each other subtly evolves through every letter as even their names change Blue to Indigo and so on. The unraveling of time lines, duty, and what's right and what's wrong are gentle and menacing at the same time. I'm reading this one again right now!

2nd Read: Still exceptional. I had a slightly different interpretation of Red and Blue this time around but am still delighted.