The following open textbooks in economics and allied fields can be accessed from anywhere.
Development Economics
Econometrics
Economics
Finance
Game theory
International Economics
International Trade
Macroeconomics
Mathematical Economics
Microeconomics
Political Economy
Time Series
Development Economics
Development Policies: Local Opportunities and Local Development
by Bagis, Bilal (Ed.)
Econometrics
Advances in Econometrics
by Verbic, Miroslav (Ed.)
Applied Econometrics
by Chang, Chia-Lin
Econometrics Textbook
by Hansen, Bruce
Optimization-Conscious Econometrics
by Pouliot, Guillaume A
Economics
An Introduction to Cooperation and Mutualism
by Boland, Michael
Boundless Economics
by Lumen Learning
Determinants of Financial Development
by Huang, Yongfu
Economics – Theory Through Applications
by Cooper, Russell and John, Andrew
Economy, Society, and Public Policy
by Core Team
Fundamentals of Global Strategy
by Kluyver, Cornelis A. de
Introduction to Economic Analysis
by McAfee, R. Preston and Lewis, Tracy R
Introduction to Women, Gender, Sexuality Studies
by Kang, Miliann et al
Making Economic Sense
by Rothbard, Murray Newton
Principles of Economics
by Taylor, Timothy, et al
Principles of Economics
by University of Minnesota
Principles of Economics
by Rittenberg, Libby and Tregarthen, Timothy
Sustaining the Commons
by Anderies, John M and Janssen, Marco
The Economics of Food and Agricultural Markets
by Barkley, Andrew
Wellbeing, Freedom and Social Justice: The Capability Approach Re-Examined
by Robeyns, Ingrid
Finance
Applied Finite Mathematics
by Sekhon, Rupinder
International Finance: Theory and Policy
by Suranovic, Steve
Money and Banking
by Wright, Robert E
Game theory
Behavioral Game Theory
by Golman, Russell (Ed.)
Game Theory
by Bonanno, Giacomo
Game Theory – Applications in Logistics and Economy
by Tuljak-Suban, Danijela
Game Theory Relaunched
by Hanappi, Hardy (Ed.)
Introduction to Game Theory: a Discovery Approach
by Nordstrom, Jennifer Firkins
International Economics
International Economics: Theory and Policy
by Suranovic, Steve
International Trade
International Trade: Theory and Policy
by Suranovic, Steve
Macroeconomics
Introduction to Macroeconomics
by Klingensmith, J. Zachary
Macroeconomics
by Lumen Learning
Macroeconomics
by Turner, Peter
Macroeconomics: Theory through Applications
by Cooper, Russell and John, Andrew
Macroeconomics: Theory, Models & Policy
by Curtis, Douglas and Irvine, Ian
Principles of Macroeconomics
by University of Minnesota
Principles of Macroeconomics
by Angjellari-Dajci, Fiorentina
Principles of Macroeconomics
by Greenlaw, Steven A and Shapiro, David
Principles of Macroeconomics – 2020-A
by Curtis, Doug and Irvine, Ian
Mathematical Economics
Mathematical Economics: Application of Fractional Calculus
by Tarasov, Vasily E (Ed.)
Microeconomics
Decision Making
by Bonanno, Giacomo
The Economics of Uncertainty and Insurance
by Bonanno, Giacomo
Intermediate Microeconomics
by Emerson, Patrick M
Introduction to Microeconomics
by Klingensmith, J. Zachary
Microeconomics
by Lumen Learning
Microeconomics
by Turner, Peter
Microeconomics
by Velasco, Ivan and College, Santa Ana
Microeconomics for Managers
by Bergman, Margo
Microeconomics: Theory Through Applications
by Cooper, Russell and John, Andrew
Models in Microeconomic Theory (‘She’ Edition)
by Osborne, Martin J and Rubinstein, Ariel
Principles of Microeconomics
by Curtis, Doug and Irvine, Ian
Principles of Microeconomics
by Hutchinson, Emma et al.
Principles of Microeconomics
by Lynham, John
Principles of Microeconomics
by Taylor, Timothy, et al
Principles of Microeconomics: Scarcity and Social Provisioning
by Dean, Erik, et al
Student Companion for Introduction to Microeconomics
by Klingensmith, J. Zachary
Uncertainty, Risk and Information
by Bonanno, Giacomo
Political Economy
Principles of Political Economy
by Saros, Daniel E
Time Series
Tea Time Numerical Analysis
by Brin, Leon
Time Series Analysis and Applications
by Mohamudally, Nawaz
Time Series Analysis: Data, Methods, and Applications
by Ngan, Chun-Kit (Ed.)