Everything you need to understand or teach This Is How You Lose the Time War by Amal El-Mohtar.
A time- and place-hopping sci-fi novel, This Is How You Lose the Time War, co-written by Amal El-Mohtar and Max Gladstone, is an epistolary story told by two future beings, operatives on opposing sides of the "Time War" tasked with ensuring that past events happen in ways that are amenable to their goals. The two find themselves growing closer together, even though they are not supposed to even communicate. The novel hops from ancient Greece to the far future and everywhere in between, dealing with the power of love, the apocalypse, and gender, among other things.