Most legitimate copies of Tanenbaum’s distributed systems book are either:
A true "portable" PDF has been reformatted—converted to single-column, with vectorized graphics, or properly tagged for screen readers. livro sistemas distribuidos tanenbaum pdf portable
While Tanenbaum’s book is not free, note that the technical field has moved toward open access. For portable reading, consider Distributed Systems by Maarten van Steen (free online in PDF/HTML, single-column responsive design). It’s not Tanenbaum, but it’s co-authored by Tanenbaum’s collaborator and native portable. A true "portable" PDF has been reformatted —converted
Full Title: Distributed Systems: Principles and Paradigms (or simply Distributed Systems) Authors: Andrew S. Tanenbaum (famous for MINIX OS and networking textbooks) & Maarten van Steen Target Audience: Undergraduate/graduate students in computer science, software engineers, and IT professionals. While Tanenbaum’s book is not free, note that
This book is one of the most authoritative references on distributed systems—covering everything from communication protocols, synchronization, replication, fault tolerance, and security to real-world examples like cloud computing, peer-to-peer networks, and distributed file systems.