The Handbell Compendium by Michael Jedamzik is a masterpiece. The author has meticulously researched and collected many details about handbells. The book itself is written in English to make it accessible to the widest possible readership. It is available as a PDF and published as Donationware, the author asks for a donation for the handbell choir Wiedensahl for the purchase of more bass bells.
The Handbell Compendium is available via the link below directly from the webpage of the handbell choir Wiedensahl.
Handbell Compendium by Michael Jedamzik (external link)