casalguidi embroidery

I have started this sample project in the Casalguidi embroidery. I had not heard about this type of embroidery before when I saw it in the book by Via Laurie. Originally whitework, this type of raised embroidery was developed in Tuscan village of Casalguidi in Italy in 19th century. It was popular for embellishing bags and clothes, as well as household linen. It always has a base of four-sided stitch, on which the embroidery is then worked. The flower in the middle is called Venetian rosette, worked with six buttonhole-stitch petals, and it is very distinctive of Casal-guidi embroidery.
There is a touch of stumpwork about it.
So far I have not been able to find any more books on the subject, only one on Amazon, which is astronomically expensive.