Review:This is slightly shorter and thicker than New World Pocket Dictionary, which my 11 year-old son claimed "perfect size". It has some distinct features that we liked: 1. Pronunciations provided 2. Words with self-evident prefix are listed separately at the bottom of pages, which make true "new" words easier to spot. 3. Pages have rounded corners (think of iPhone), thus less prone to being creased. 4. It does have 40000 words, about 100 per page, a good overall size. 5. Less words on one page make... Read more