Goodreads Book Title, Author Name Extractor: http://denizkumsal.com/programming/trifecta-filter-map-reduce/

book-title-author-name-extractor.js

console.log(
  Array.from(document.querySelectorAll(".bookTitle, .authorName"))
    .filter((entry) => entry.attributes.itemprop)
    .map((entry) => entry.innerText.replace(/\s\(.*?\)\s?/, ""))
    .reduce(
      (result, entry, index, list) =>
        index % 2 == 0 ? result.concat(`${list[index]}, ${list[index + 1]}`) : result,
      []
    )
    .join("\n")
);