Tactical Periodization and Complex Soccer
As an amateur coach I did not follow the courses of Victor Fradé, its creator. So, I can only talk about tactical periodisation through his writings, those of a number of his "disciples" such as Tamarit, Maciel, Reis or Julian Tobar (who themselves consider that many professional coaches who claim to be using PT do not apply it as recommended by Victor Fradé) and through exchanges with coaches who do practice it. And from my experience and personal practice over the past 15 years.
In this blog you can find articles on tactical periodisation and more generally on complex football. In addition to my book on the subject, you may wish to read the reference authors on tactical periodisation.