This Is How You Lose The Time War by Amal El-Motar and Max Gladstone

 

They fight across centuries and across time.  They are each the best warriors of their type.  Blue and Red are sworn enemies of their organizations and only one can finally win and continue its existence.  Blue is the growing entity; full of spring and summer and flowers and birds and lush vegetation  Red is cerebral, made of logic and circuits, unemotional and unrelenting.  

But as time goes by, things start to change.  Red and Blue start to appreciate things about each other in their unending battle to defeat each other once and for all.  As they slip up and down the time continuum, carrying out missions for their sides as they plan the next step in their personal battles, they start to communicate.  Each leaves notes for the other and as they read these missives, they start to know each other and to feel what the other feels.  Finally, over millennium, they start to fall in love.  But how can enemies love?  If their masters ever discover their feelings for each other, they will be utterly destroyed.  How to love, an impossibility in the first place, and keep it so hidden that it can never even be guessed at?

Amal El-Motar and Max Gladstone are both award-winning novelists in the science fiction genre. El-Motar has won the Hugo, Nebula and Locus awards with her short stories while Gladstone has been a finalist for the Hugo awards for best novel.  Together they have written an intriguing work that awakens emotions in the reader; a hope that there is a place somewhere for these two enemies to find love.  The writing is luminous and lush and the reader wonders how the work was divided.  Did one author write Blue and the other Red or did they collaborate on each section?  However it was done, this is a masterful work that will be remembered long after the last page is read and is recommended for readers of science fiction.