Download all your Kindle books automation.

kindle_download.js

// How to use this?
// * Navigate to the first page of your "Digital Content -> Books" section.
// * Figure out where your kindle is in the list and update `deviceIndex` below.
// * Open up a dev console and paste all of this in.
// * Type `downloadAll(0);` into the dev console and hit enter.
// * Repeat the above step for each page of books.
// 
// This is tested in latest Firefox, and will probably break the second Amazon
// changes anything on the pages used.

// change this to the zero-based index of your kindle in the list
const deviceIndex = 0

clickRadio = () => {
  const radio = [...document.querySelectorAll("input[type=radio]")].filter((el) => el.checkVisibility({
    visibilityProperty: true
  }))[deviceIndex];

  radio.click();

  setTimeout(clickDownload, 1000);
};

clickDownload = () => {
  const download = [...document.querySelectorAll("div[id^=DOWNLOAD_AND_TRANSFER] > span")].filter((el) => el.checkVisibility({
    visibilityProperty: true
  }))[1];

  download.click();

  setTimeout(() => {
    document.querySelector("span#notification-close").click();
  }, 1000);
};

download = () => {
  const options = document.querySelectorAll("div[class^='Dropdown-module_dropdown_container'][style*='visibility: visible;'] > div");

  for (const el of options) {
    if (!el.innerText.includes("Download")) {
      console.log("skipping");
      continue;
    }

    el.querySelector("span").click();

    setTimeout(clickRadio, 1000);

    break;
  }
};

downloadAll = (index) => {
  [...document.querySelectorAll(".dropdown_title")][index].click();
  setTimeout(download, 1000);

  if (index < 24) {
    setTimeout(() => { downloadAll(index + 1) }, 5000);
  }
};