You're twelve years old on Thanksgiving at six thirty in the morning. You'll be leaving for Grandma's in about a half hour, and she's lives a three hour drive away, going in one direction. You have nothing to prepare yourself on this journey, other than a tablet running Android Eleven. Beware, the speaker is broken and there is no headphone jack. Google Play complains that the device isn't certified or whatever, but that isn't going to stop you from downloading apps from third party websites using the family computer. Plus, you have one great advantage: F-droid is installed and ready to rock.
You must hurry, because you wont have an internet connection once you hit the road. Quick, what apps do you install? You have 128GiB's at your disposal.
Slightly off topic, but I absolutely hate AO3's formatting. I much prefer fanfiction net.
Download as epub then use pandoc to convert to whatever. I'm throwback enough to prefer plain text.