I found the beginning of All the Light We Cannot See a little hard to get through, but it clicked somewhere in the first third and I started to enjoy it. If you end up liking Out, I recommend taking a look at the author's other works. I'm not sure which of them are available in English (and sadly, the English translations can be a little weak in places), but basically all of them touch upon 'taboo' topics and end up with conservatives clutching their pearls in the background haha.