The book represents a straightforward method in order to design an interplanetary mission using gravity assist and patched conics sections to constitute the total trajectories. The complete knowledge and relations you need are inserted in chapters one and two, the technique of calculations were discussed in details in chapter three, finally the application of the method to the trajectory from Earth to Jupiter with fly by with Mars with complete calculations and their algorithms are presented in chapter four. The Algorithms of calculations in Mathematica 10 are available in the link in Appendix B. With the discussion and the method presented in the book you can design multiple gravity assist missions simply by inserting the orbital elements of the desired planets and get the results immediately by using the Mathematica program given in the book.