The book "This Is Going to Hurt: Secret Diaries of a Junior Doctor" by Adam Kay is a nonfiction collection of diary entries written during his medical training from 2004 to 2010. It humorously and poignantly recounts his experiences as a junior doctor in the UK's National Health Service (NHS), highlighting the challenges, political issues, and personal sacrifices faced by medical professionals. Themes include the mistreatment and neglect of doctors, the unrealistic expectations placed on them, and the emotional and physical toll of their work. The book also responds to criticisms of junior doctors by government officials, portraying the reality of their demanding, underpaid roles in healthcare. It has been highly praised for its candid, raw, and insightful look into the life of a junior doctor and has sold millions of copies worldwide. The book was also adapted into a BBC comedy-drama series.