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Free Ebooks DownloadWelcome to DL4ALL.org – your ultimate destination for ebooks across every genre. Whether you’re into fiction, self-help, education, or niche topics, we offer an extensive library to satisfy your thirst for knowledge and entertainment. Why Choose DL4ALL.org?
Start your reading journey today on DL4ALL.org and unlock a world of imagination, knowledge, and inspiration!  The Shrikhande Graph: A Window on Discrete Mathematics English | 2026 | ISBN: 1009709100 | 176 Pages | PDF | 4 MB The Shrikhande graph, discovered by Indian Mathematician Sharadchandra Shankar Shrikhande in 1959, exhibits several unusual properties and occupies a pivotal position within discrete mathematics. Offering a unique introduction to graph theory and discrete mathematics, this book uses the example of the Shrikhande graph as a window through which these topics can be explored. Providing historical background, including the Euler conjecture and its demise, the authors explore key concepts including: Cayley graphs; topological graph theory; spectral theory; Latin squares; root systems. A novel and valuable resource for graduate students and researchers interested in graph theory, its history, and applications, this book offers a comprehensive exploration of the Shrikhande graph and its significance.  The Secret Lives of Dragons and Other Mythical Creatures: And How to Draw Them English | 2026 | ISBN: 1577158423 | 378 Pages | EPUB | 22 MB Conjure a gathering of dragons and fantastical beasts and beings with step-by-step drawing instruction from leading fantasy illustrators.  The Secret History of Language: Language Change Unraveled English | 2026 | ISBN: 1009757962 | 241 Pages | PDF | 11 MB What are the causes of language change? Where do words come from? Is modern technology and social media corrupting our language? Language change is just as relevant today as it ever was, yet the secrets of how and why it occurs remain tantalisingly out of reach to anyone without a background in linguistics. This book has the answers. Written by one of the leading experts in the field, it provides readers with an accessible account of language change, unraveling the processes and phenomena that have so far remained locked within academia. It explores a range of fascinating topics, such as whether language change is bad, whether change is different in some kinds of languages than others, and if television, AI, and modern technology have any impact on language change. Written in a lively and engaging way, it uncovers the marvels and mysteries of language change for anyone curious about this captivating field.  The Science of Happiness: Definitions, Distinctions and Evidence-Based Pathways to Well-Being English | 2026 | ISBN: 3032253896 | 269 Pages | PDF EPUB (True) | 5 MB This book provides a comprehensive overview to the science of happiness research. It discusses scholarly definitions and measurements, and factors-personal, social and cultural-that reliably increase happiness throughout the life-span. Anchored in psychology, philosophy, economics and public health, the book distils hundreds of peer-reviewed studies into one lucid, teachable framework. Part I traces the idea from classical eudaimonia to modern positive psychology, then untangles more than thirty related terms-well-being, flourishing, thriving, life satisfaction and others-into a working map of key distinctions. The discussion shows why happiness remains one of the most diversely interpreted phenomena in the social sciences and why no single definition yet commands unanimous agreement. Part II presents a multilevel map of determinants, starting with personality and health, then progressing to relationships, income, culture, and the built and natural environments. The final chapter in this part evaluates evidence-based interventions, showing how current research can inform realistic, context-sensitive pathways to greater well-being-from gratitude practices and mindset trainings to policy levers aimed at housing affordability, neighborhood quality, institutional fairness, and life-course support. Each chapter weighs competing findings, flags methodological caveats and pinpoints areas of empirical convergence. Written for graduate students, researchers and reflective practitioners, this book offers conceptual rigour without sacrificing readability. Readers will finish equipped to design stronger studies, craft data-driven policies and pursue personal well-being grounded in evidence rather than myth.  The Role of Marketing in Reshaping the Dynamic Landscape of Business English | 2026 | ISBN: 3032199468 | 290 Pages | PDF (True) | 7 MB This conference proceedings focuses on how marketing continues to evolve in response to technological innovation, sustainability imperatives, and shifting consumer expectations. Featuring full papers presented at the 2025 Academy of Marketing Science World Marketing Congress held in Dijon, France, this book features contributions from leading scholars and practitioners to provide a comprehensive view of marketing's transformative role in a rapidly changing business environment. Featuring topics such as AI and marketing, consumer behavior and sustainability, brand communication and crisis management, and digital marketing, this book is a useful reference for marketing researchers, scholars, students, and policymakers.  The Rising Sons: China's Imperial Succession & The Art Of War English | 2022 | ISBN: 9811240639 | 189 Pages | EPUB (True) | 6 MB The Rising Sons: China's Imperial Succession & The Art of War recollects 2,000 years of China's history by examining how some of its most representative imperial rulers seized power by applying tactics and strategies from Sun Tzu's The Art of War. This volume brings together tales of the nine princes of the Qin to Qing dynasties who rose to power through their cunning wit and prowess at psychological warfare. Brimming in equal measure with narrative interest and analytical insight, this book is as much a page turner about human greed, ambition and its capacity for cruelty as it is a treatise on power dynamics and court politics.  The Researcher's Journey in the Age of AI: Reappraising Social Science Research English | 2026 | ISBN: 3032230683 | 814 Pages | PDF EPUB (True) | 31 MB The rapid development of AI has exposed long-standing weaknesses in how the social sciences explain behavior, meaning, and social order. As machines increasingly replicate tasks once thought uniquely human, the question is no longer whether the social sciences must rethink themselves, but how. This book argues that the most robust and enduring contributions to the social sciences are those grounded in evolutionary theory. By drawing systematically on biology, cognition, culture, and systems thinking, it develops a coherent framework for organizing the social sciences around a shared understanding of human nature. Especially in light of AI, the future may demand us to define our humanity not only by intelligence, but also by responsibility and stewardship. In this sense, the renewal of social science unfolds within a broader ethical horizon relevant to planetary sustainability.  The Rectal Gland of the Shark: A Model for the Epithelial Transport of Chloride and Its Control English | 2026 | ISBN: 3032226287 | 258 Pages | PDF EPUB (True) | 31 MB This book provides a detailed account of the intricate mechanisms and regulation of epithelial chloride transport, offering valuable insights into the regulation of salt balance in various vertebrate epithelial tissues. Over sixty years ago, J. Wendell Burger discovered that the rectal gland of elasmobranchs was the extrarenal organ responsible for excreting the salt gained by the animals. Since then, the rectal gland of elasmobranchs has been the only organ enabling whole organ, tissue, cellular and molecular studies of secondary active transport.  The Python Workshop: A Practical, No-Nonsense Introduction to Python Development by Andrew Bird English | 2019 | ISBN: 9781839218859 | 606 Pages | PDF (True) | 7 MB  The Psychology of Serial Murder: Current Evidence English | 2026 | ISBN: 3032222273 | 544 Pages | PDF EPUB (True) | 9 MB This timely volume offers comprehensive and up-to-date coverage of serial homicide, which has been on the increase since the 1990's. It provides an understanding of these criminal acts and their perpetrators. The book uses a holistic approach and highlights accurate means of early identification and future risk. It is an invaluable resource for mental health professionals and all those who study and work with this criminal phenomenon. |
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