This was my 38th book, first with my new co-author.
We used old printers, he visited where 3D Printer came to be in the UK and used an original RepRap printer, while I talked with USA maker Makerbot who sent me one of their first 3D Printers, their maker helped me very much.
We used items from Thingiverse originally and scans were possible for caves back then, He backame well known in Europe meeting with Royalty and talking at events to make 3D Printing more well known. This was the first book on 3D Printing in the US might be more in the UK back then no way to see backwards,