These unabridged essays by Carl Sagan were originally published in either popular science magazines or academic journals. This is the first time his essays have become available on audio.

    Focused on helping students understand and construct proofs and expanding their mathematical maturity, this best-selling text is an accessible introduction to discrete mathematics. Johnsonbaugh's algorithmic approach emphasizes problem-solving techniques. The Seventh Edition reflects user and reviewer feedback on both content and organization.

    Amid the last refugees fleeing the advance, the duo is caught up in an assignment that will prove to be either their salvation or undoing.From the stinking mists of the Bloodsmeath Marsh to the back alleys of Five Fingers, Taryn & Rutger will do everything in their power to survive a game of Moving Targets.

     Beginning with her solitary childhood in London, it took years for Melanie Phillips to understand her parents’ emotional frailties and even longer to escape from them. But Phillips inherited her family’s strong Jewish values and a passionate commitment to freedom from oppression. It was this moral foundation that ultimately turned her against the warped and tyrannical attitudes of the Left, requiring her to break away not only from her parents—but also from the people she had seen as her wider political family. Through her poignant story of transformation and separation, we gain insight into the political uproar that has engulfed the West. Britain’s vote to leave the EU, the rise of far-Right political parties in Europe, and the stunning election of US president Donald Trump all involve a revolt against the elites by millions. It is these disdained masses who have been championed by Melanie Phillips in a career as prescient as it has been provocative. Guardian Angel is not only an affecting personal story, but it provides a vital explanation why the West is at a critical crossroads today. “Melanie Phillips has been one of the brave and necessary voices of our time, unafraid to speak the language of moral responsibility in an age of obfuscation and denial. This searing account of her personal journey is compelling testimony to her courage in speaking truth to power.”—Rabbi Lord Jonathan Sacks

    The author, Elliot Bogod, is a Founder and Managing Director of Broadway Realty, a real estate brokerage in Manhattan. With over twenty years experience, Elliot has sold over $2 billion in New York real estate. In this book, you will find: • A list of “magic words” often used in real estate investment, with clear and detailed explanations • Methods for evaluating the locations for your investments, using vibrant Manhattan neighborhoods as an example. • Review of different types of residential investments: condominiums, co-ops and townhouses • Detailed advice on investing in various types of commercial real estate: retail locations, offices, restaurants, hotels, garages and others • Multiple strategies, tactics and techniques for building wealth through your investments • Clear and concise information on mortgages, taxes and laws • Methods for achieving success through managing a team of experts working for you