The Book of Knowledge of Impractical Musical Devices


The paperback version of the Book of Knowledge of Impractical Devices is now sold out, many thanks to everyone who purchased a copy!

However, you *can* buy t-shirts and tote bags with Tommy’s lovely designs right now from Teemill. Visit the store to purchase.

Support the Book of Knowledge

The instruments that you can see on this website and in the videos are currently the only versions that exist. They are not for sale.

I am currently developing plans to make a small batch of the instruments for possible sale in the future. Please let me know if you would be interested in this, as it will help me approach it in the best way. Send me an email or say hello on Twitter.