Free online book Higher-Order Perl by by Mark Jason Dominus is about functional programming techniques in Perl. It s about how to write functions that can modify and manufacture other functions.

Multi-core programming - Shameem Akhter & Jason Roberts. Book is in russian.

自己搜索的field ii一些资料，如果有新人需要学习，可以看看，里面包括一个博士培训资料和杰森写的两篇文章。-Their search field II some of the information, if there is a need to learn, you can see, which includes two articles a doctoral training data and written by Jason.