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Here are some highly regarded books in philosophy, economics, and sociology that offer foundational insights as well as modern perspectives:

Philosophy

1. "Meditations" by Marcus Aurelius
   A timeless classic of Stoic philosophy, offering personal reflections on how to live a virtuous and meaningful life. It provides wisdom on handling adversity, power, and mortality.

2. "The Republic" by Plato
   This work explores justice, governance, and the ideal society. Plato, through the voice of Socrates, delves into questions about the nature of reality, ethics, and politics.

3. "Being and Time" by Martin Heidegger
   Heidegger's seminal work that addresses the nature of existence and what it means to be human. This book is central to existentialist philosophy and phenomenology.

4. "Critique of Pure Reason" by Immanuel Kant
   A foundational text in modern philosophy, this work explores the limits and scope of human understanding, blending empiricism and rationalism.

5. "The Myth of Sisyphus" by Albert Camus
   A key work in existentialism, where Camus presents the idea of the "absurd" and explores how humans can find meaning in life despite its inherent meaninglessness.

Economics

1. "The Wealth of Nations" by Adam Smith
   The cornerstone of classical economics, it introduces the idea of the "invisible hand" and lays out fundamental principles of market economics and free trade.

2. "Capital in the Twenty-First Century" by Thomas Piketty
   A modern classic that delves into wealth inequality, analyzing economic history and proposing reforms to prevent runaway inequality.

3. "The General Theory of Employment, Interest, and Money" by John Maynard Keynes
   Keynes challenges classical economics and presents his ideas about the role of government intervention in stabilizing economies during recessions.

4. "Freakonomics" by Steven D. Levitt and Stephen J. Dubner
   A more contemporary and accessible book, this examines everyday phenomena through the lens of economics, offering fresh insights into how incentives shape behavior.

5. "Poor Economics" by Abhijit V. Banerjee and Esther Duflo
   Written by two Nobel Prize winners, this book explores the causes and solutions to global poverty, drawing from detailed fieldwork and experimental research in development economics.

Sociology

1. "The Sociological Imagination" by C. Wright Mills
   A classic that urges readers to understand the link between personal experiences and larger social forces. Mills encourages a critical awareness of societal structures and their impact on individual lives.

2. "Suicide" by Émile Durkheim
   Durkheim's groundbreaking study that demonstrates how social factors, rather than individual psychology, influence suicide rates, laying the groundwork for sociology as a scientific discipline.

3. "The Presentation of Self in Everyday Life" by Erving Goffman
   Goffman explores how individuals perform social roles and manage impressions in everyday interactions, contributing to the field of symbolic interactionism.

4. "The Protestant Ethic and the Spirit of Capitalism" by Max Weber
   Weber examines how Protestant ethics and values contributed to the development of capitalism, blending religious sociology and economic theory.

5. "Bowling Alone: The Collapse and Revival of American Community" by Robert D. Putnam
   This work explores the decline of social capital in the U.S. and how modern society has become more disconnected, contributing to a weakening of community bonds.

These books range from classic foundational texts to contemporary works that provide insights into pressing modern issues, giving you a comprehensive view of each discipline.