CALCULUS For the Practical Man by J. E. THOMPSON. Originally published in 1931. PREFACE: THIS book on simplified calculus is one of a series designed by the author and publisher for the reader with an interest in the meaning and simpler technique of mathematical science, and for those who wish to obtain a practical mastery of some of the more usual and directly useful branches of the science without the aid of a teacher. Like the other books in the...

When Ruby regains consciousness in a dingy prison cell, she quickly realizes that she is suffering from a suspicious bout of amnesia. She remembers her name, but the rest of her memories appear to be locked behind an impenetrable mental barrier. A man wearing luxurious purple robes informs her that a royal has been assassinated, and Ruby is the kingdom's only suspect in the murder. He claims that she fought the guards so fiercely that they couldn't...

In this compelling autobiography, the author shares her account of 9/11 and the days that followed. Before going to sleep each evening, she furiously documented the chaos and humanity that surrounded her and New York City. Not wanting to forget anything, she detailed the long days wandering the island, volunteering at the Armory, and circumnavigating Ground Zero. Then she stuffed the story away for 20 years, too raw to read it. In 2021, she finally...