Houghton Mifflin Harcourt Reaching the Top of the World (Novel unit magazine) In this magazine you will discover a world of achievers. You'll read about runner who crosses America in a 1928 foot race, and a mountain climber who relies on his sense of touch. A neighborhood that comes together to save a dog may inspire you. You'll read poems and articles about sports, spellers, and inventions, and do a lots of fun activities.