Recs if you like Under Milk Wood...

Shorter books (under 200 pages) that are part of at least one quest. Many are also in the public domain, making them easily accessible when you want to grind for that next badge.

books set in wales or ireland to get to know my ancestors

Because we all know Colin Meloy loves a good book. List of songs and references in the comments; well known works listed when authors are broadly referenced. Recommendations appreciated for items that were overlooked.