The Mentor: Butterflies, Volume 3, Issue 12, Series #88, August 2, 1915 is a nonfiction book by William Jacob Holland that offers the reader a unique look at the world at the beginning of the 20th century. The publication contains important events of that time, current news and interesting articles about politics, science and culture of the beginning of the last century. Thanks to this book, the reader can better understand the social and cultural trends of the era and feel the atmosphere of that time. "Teacher: Butterflies" is a valuable historical document that reveals to us the differences and similarities of the past and the modern world.