I cannot for the life of me remember the name of this book. One main part was the earth had been invaded and people were volunteering for their brains to be wired into large robots/ combat chassis and there were different versions of chassis? I know it's vague but it's all I can remember!!
Sorry! The book I read was in the late 80's in English. Am sure it was set in the uk, the main character had lost a loved one and went for the programme to become one of these things, can't remember anything else 😔