Harpal Brar is kind of weird. If you want to learn about "trotskyism" you should read "the transitional program" it's online, at a site called marxists.org along with a plethora of other political texts. Anyways welcome to revleft.
Hey comrade, I saw your topic asking about Trotskyism and thought this work would be of interest to you called "Trotskyism or Leninism?" by Harpal Brar.