Context:

Described as 'a superb book about Boudicca' that 'came out last year.' Referenced multiple times throughout the episode for its descriptions of Icanian coins, the Fison Way archaeological site, the fall of Camulodunum, and the author's theory about where the final battle with Boudicca took place. Tom quotes from it and calls it 'wonderful.'

Context:

Described as 'a superb book on Boudicca' that came out the previous year, called 'the best book on Roman Britain I've read in ages.' Tom quotes McKay's description of British coins as 'little tabs of hallucinatory braille'