If you are looking for actual performance techniques (the "art of mentalism"), experts often point to these classics, which may be found on sites like Trickshop.com or Scribd :
: A guide specifically covering the techniques of mentalism. Trusted Platforms for Downloading Russian E-Books
Менталист - Камилла Лэкберг - Флибуста
: Part of a broader mentalist-themed series focusing on psychological influence.