What did Amy name her electric toothbrush?

What does Leonard bring Penny back from the North Pole? The Big Bang Theory Trivia Quiz Book is the first official book to accompany one of the world's favourite and funniest comedies. Including 1,600 questions from series 1 to 8, along with photos, hilarious quotes, a complete episode guide and fun features, such as excerpts from the Roommate Agreement and your chance to play ''Emily or Cinnamon'', this book will remind you of all your favourite Big Bang moments.