Endur­ing his can­cer’s painful toll, Gor­don Zacks used his last strength to write this book in less than a month — com­plet­ing one last pur­pose­ful con­tri­bu­tion to a remark­able life. Cather­ine Zacks Gilden­horn, Gor­don Zacks’ eldest daugh­ter, has been inti­mate­ly involved in the devel­op­ment of this book, and serves as its Edi­tor-in-Chief. She was specif­i­cal­ly asked by him to be the book’s spokesper­son and advo­cate going forward.