UPDATE 
 Let's begin... 
 The cover? Yes? It kind of reminds me of the projects you use to make in elementary? The one with the rainbow shadow thing... 
 Characters? AMAZING!!!! 
 We got this badass Emika Chen. Who is... no, you better read it. You have to discover them for yourselves. 
 Plot? Oh, hell to the YAAAAAS! 
 Come on? Spying, secrets, hacking stuff, TOKYO, JAPAN?! Or this book being sci-fi alone? Okay, maybe not but a sci-fi written by Marie Lu? Yeah, you wouldn't resist either. 
 Flipping through chapter one alone is enough to hook you! Literally! Action filled chapters with well-blended elements of great world building. I would love to say more but it still is fresh in my mind. I might give away some spoilers. I'd sum all my emotions through gifs. 
 Then about 3 chapters before I had reached the end cover of the book...