I have 3 of Ken Cornell's books and they are all called the low and medium frequency scrapbook . One is an all solid state edition . I don't know how many there are in the entire set . They show up from time to time on some of the used book sites or even that auction place. Charlie , W5COV CV , 185.298 kHz . , QRSS60 , 24 / 7 , EM26ex , OK.