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100+ Free Engineering Books [PDF]

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Looking for engineering books? We've gathered over 100 free engineering books in PDF across 30+ subcategories covering every major branch.

From civil and mechanical engineering to electrical, chemical, and aerospace, this collection covers the core of every discipline. Whether you're a student or a working professional, there's something here.

Browse our top picks or explore by topic. Every book is free to read online or download as PDF.

Top 10 Engineering Books

These are our top picks for engineering textbooks you can download right now. Each one covers a core area, from fluid mechanics and heat transfer to probability and aerospace.

All of them are used in real university courses. Ideal as study guides or quick references for working professionals.

  • Basics of Fluid Mechanics

    Covers fluid mechanics from fundamental properties through thermodynamics, statics, compressible flow, and open channel flow. Features methodical progression and extensive problem sets bridging theory and practical applications.

    Genick Bar-Meir

    Format: PDF 666 pages 8.02 MB
  • A Heat Transfer Textbook (6th Edition)

    Comprehensive heat and mass transfer textbook used in classrooms for over 40 years, covering conduction, convection, radiation, phase-change heat transfer, and heat exchangers. Now in its 6th edition from MIT.

    John H. Lienhard IV

    Format: PDF 810 pages 12.31 MB
  • Engineering Statics: Open and Interactive

    Free open-source textbook covering vectors, forces, moments, static equilibrium, and properties of shapes for the foundational Engineering Mechanics: Statics course. Includes interactive diagrams and extensive examples.

    Daniel W. Baker & William Haynes

    Format: PDF 467 pages 7.27 MB
  • Fundamentals of Electrical Engineering I

    Introductory textbook covering signals, systems, analog and digital signal processing, circuit analysis, and information theory including Fourier transforms, filtering, and digital communication.

    Don H. Johnson

    Format: PDF 278 pages 2.85 MB
  • Mechanics of Materials

    MIT textbook covering tensile response, trusses, pressure vessels, stress and strain analysis, bending, finite element analysis, yield, fracture mechanics, and fatigue. Bridges fundamental mechanics with advanced structural analysis.

    David Roylance

    Format: PDF 319 pages 30.46 MB
  • Sustainability: A Comprehensive Foundation

    Multidisciplinary textbook exploring sustainability across environmental science, economics, policy, and engineering, with case studies from climate change to sustainable energy systems and urban planning.

    Tom Theis & Jonathan Tomkin

    Format: PDF 398 pages 14.89 MB
  • Structural Dynamics

    Covers structural dynamics theory from fundamentals through multi-degree-of-freedom systems, including vibration analysis, numerical methods, seismic response, and earthquake engineering applications for civil and structural engineers.

    Hilmi Lus & Sinan Keten

    Format: PDF 388 pages 8.07 MB
  • Fundamentals of Aerospace Engineering

    Introductory aerospace engineering textbook covering aerodynamics, materials and structures, propulsion, flight mechanics, air transportation, airports, and air navigation. Comprehensive overview of the aeronautical discipline.

    Manuel Soler

    Format: PDF 404 pages 8.91 MB
  • Notes on Diffy Qs: Differential Equations for Engineers

    Concise, engineer-focused textbook on differential equations covering first order ODEs, systems, Fourier series, PDEs, eigenvalue problems, the Laplace transform, and nonlinear systems. Written in an accessible style specifically for engineering students.

    Jiri Lebl

    Format: PDF 371 pages 3.48 MB
  • Introduction to Probability

    Comprehensive probability textbook covering discrete and continuous distributions, combinatorics, conditional probability, expected value, sums of random variables, and central limit theorem. Published by the American Mathematical Society.

    Charles M. Grinstead & J. Laurie Snell

    Format: PDF 518 pages 2.81 MB

Browse All Engineering Topics

Want to go deeper into a specific branch? Explore all 30+ engineering topics below, from robotics and materials science to biomedical and environmental engineering.

That covers our top engineering books and every branch you can explore. Whether you're looking for tutorials on fluid mechanics or an intro to structural dynamics, it's all free.

Looking for more free books? Browse our complete free books collection.

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