- 
    Best book on eugenicsWesley SmithNational Review
- 
    Compelling; zeal of an avengerGregory MottWashington Post Book World
- 
    Extensive; systematicGregg SappLibrary Journal
- 
    ChillingDaniel KevlesNew York Times Book Review
- 
    Scary and necessaryAdrienne MillerEsquire Magazine
- 
    Shocking and grippingStarred Review at Publishers Weekly
- 
    ImpressiveRay OlsonBooklist
- 
    Ambitious; richly detailedTony PlattLos Angeles Times Book Review
- 
    Prodigious feat of reportingDavid PlotzMother Jones
- 
    SensationalPaul RanierDer Spiegel
- 
    Hair-raising; eye-openingNancy SchapiroSt. Louis Post-Dispatch
- 
    Most chillingCarl ZimmerDiscovery
- 
    MindblowingCynthia DettelbachCleveland Jewish News
- 
    Well-documented, comprehensiveSteve CourtneyHartford Courant
- 
    Chilling and thoroughly researchedMark LewisTampa Tribune
- 
    A phenomenal blockbusterS. Jay OlshanskySocial Biology (successor to Eugenical News)
- 
    Valuable contributionJack FischelThe Forward
- 
    Sobering accountAmy DeBaetsEthics and Medicine
- 
    Gripping narrativeAbraham H. FoxmanNational Director, ADL
- 
    Careful scholarshipWilliam E. SpriggsExecutive Director, National Urban League Institute for Opportunity and Equality
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    Must not be ignoredMalcolm HoenleinConference of Presidents of American Jewish Organizations
- 
    A powerful spotlightLisa NavarreteVP, National Council of La Raza
- 
    Fascinating and disturbingRabbi Martin HierFounder and Dean of the Simon Wiesenthal Center
- 
    An important lessonDr. Samuel M. EdelmanHolocaust Educator
- 
    Surrealistic masterpieceChaim Y. BotwinickPresident, Center for the Advancement of Jewish Education
- 
    Unique and disquietingBenno Müller-HillProfessor, author, Murderous Science
