The book was featured in Herbert Spencer's Typographica (Old Series, number 16, 1959) in and Eye magazine (no.
[1] In Rick Poynor's Typographica he translates the Dutch title as "Capitals, twin- and multi-print.
Erik Kindel, author of the 2003 Eye article sums up with a contemporary evaluation of the book: Casting a cold eye over Hoofdletters, Tweeling- en Meerlingdruk, it is difficult to see it as anything more than an earnest but bizarre solution to what was undoubtedly a real problem in postwar Europe, and the Netherlands in particular.
But if Hoofdletters is designated a practical failure, a typography in extremis, something stops us from dismissing it out of hand.
While there is no indication that Van den Bergh regarded Hoofdletters with anything but complete seriousness, 45 years on it, too, operates, if accidentally, as an ingenious satire – on the preoccupations of legibility research, or the promise of technology so readily associated with the period of its invention"[2]