Just got confirmation that BR 21339 was withdrawn from production back in 2016, but NLS never got around to pulling it from Voyager, nor told anyone (but I digress).
Some other Braille titles that seem like they might be ripe for confirming the status on with NLS:
BR 20716 Capturing Music
BR 20599 Bumpology
BR 19592 Mathematics Minus Fear
BR 18762 Beauty Is a Verb - possibly redone as BR 24267 ?
