For the one who wants to learn sculpture in stone, nothing beats doing it yourself. But if you want to deepen your knowledge, then these books can be useful to learn sculpting:
* The complete book of sculpting. Camí Santamera (Josepmaria Teixido i Camí/Jacinto Chicarro Santamera) Cantecleer Baarn, 2001. ISBN 90-213-3126-8 / 90-439-1253-0
A clear record of good shots and a lot of explanation about different movements and techniques to learn stone sculpture, for example direct carving, copying with the "pointing machine", enlarging and various methods to copy models in stone.
* Der Steinmetz und Steinbildhauer 1 at for example De Hazelaar
* Der Steinmetz und Steinbildhauer 2 at for example De Hazelaar
* Letter Carving in Stone at. BICK Art supplies
And then, perhaps,:
*John Wilkes: Flowforms at bol.com