Reviews The Essential Engineer: Why Science Alone Will Not Solve Our Global Problems by Henry Petroski Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Science News March 26, 2010 at 1:19 pm The approaches of scientists and engineers complement each other, an engineer and historian argues. The Essential Engineer: Why Science Alone Will Not Solve Our Global Problems by Henry Petroski Alfred A. Knopf, 2010, 274 p., $26.95.