What is the author's style in Against All Enemies by Richard A. Clarke?

This book, Richard Clarke's retrospective description of his own experiences, was written in English: the exhortations at the end of his Preface and Epilogue suggest that Americans were his primary intended audience. He uses the present tense throughout: in the first chapter, the reader is there with Clarke in the Situation Room as he organizes the U.S.'s initial response. In the next 9 chapters, he describes his experiences from the 1980s through the summer of 2001. Except for his analytic critique of the U.S.'s invasion of Iraq in, the final chapter, he uses language descriptively, to relate his own experiences.