I'm looking to learn more abut Quasi-Experimentation (as I believe it will come in great use at work). Currently I am thinking about purchasing the book Quasi-Experimentation: Design & Analysis Issues for Field Settings by Cook and Campbell (http://www.amazon.com/gp/product/039...pf_rd_i=507846).

However I am curious if anybody has another suggestion of a better book? I work in healthcare if that has any impact on the type of book I should consider purchasing.