Hmmmm......... how I deal with book hangovers. NOT WELL. I usually can't read another book for at least a week if I really loved it. For instance, after I finish Never Fade, I reread both the Darkest Minds and Never Fade. Same with The 5th Wave. I just get really depressed and it's not cool and I don't like it! And I will just constantly think about the book. Being able to review books now makes it easier to get over the hangover, but it's still pretty bad.
That's all I've got for today, but I will post again tomorrow. Let me know in the comments how you deal with book hangovers.