If they use Goodreads , you can use the "Compare Books" tool to see what they’ve already read and their "Want to Read" list.
If you are worried they’ve already cleared out the bestseller list, consider these unique alternatives: The Ultimate Book Gift Giving Guide | Medium - A. K. Young what book to buy as a gift
Determine if certain topics are off-limits due to lifestyle or beliefs (e.g., avoid intense thrillers for someone who prefers "cozy" vibes). If they use Goodreads , you can use