Grammar Punctuation And Capitalization:
The four chapters making up this reference publication were originally written as part of an ongoing effort to write a style manual for the Technical Editing Branch of the NASA Langley Research Center. These chapters were written for technical publishing professionals (primarily technical editors) at Langley. At the urging of my branch head, I am making this part of the style manual available to the technical publishing community. This publication is directed toward professional writers, editors, and proofreaders. Those whose profession lies in other areas (for example, research or management), but who have occasion to write or review others' writing will also find this information useful. By carefully studying the examples and revisions to these examples, you can discern most of the techniques in my editing "bag of tricks"; I hope that you editors will find these of particular interest.

Harvard Business School - Project Management Manual
Concise manual for project management practitioners. Because of its consisting of only 42 pages, material is easier to master than other books describing this area. I personally enjoyed it also as a source of American - English business related vocabulary.