https://news.bitcoin.com/review-encyclopedia-physical-bitcoins-crypto-currencies/
"In his highly detailed and exhaustive catalog of physical cryptocurrencies, Ahonen takes us on a journey from the very first attempts to produce these physical coins, cementing his place as one of the first ‘bitcoin historians'."
"Collectively, these coins represent the rich material history of early bitcoin and cryptocurrency that Ahonen has meticulously detailed in this book."
"Last April, after a signed copy was lost en route to Singapore, Ahonen flew to the buyer from Canada to personally sign a copy"