Solo Game Master's Guide

Player's Guide to Solo Roleplay (English Edition)

Pen & Sword Military

Solo Wargaming: A Practitioner's Guide          

Independently published

Old School Revival Solo Role-Playing Guide      

Independently published

Killing Floor 3 Game Guide: Master Nightfall’s Rebellion with Strategies for Solo and Co-op Combat in 2091

Roboquest: The Ultimate Guardian's Guide: Master the Game, Unlock Every Secret, and Conquer the Battlefields in Solo and Co-op Play (English Edition)

Ninja Gaiden: Ragebound Game Guide : Master the Art of Ninja Fusion And Strategies for Solo And Co-op Glory (English Edition)

Independently published

Borderlands 4: Vault Hunter’s Master Guide: Dominate the Wastelands with Expert Builds, Legendary Loot, and Boss-Crushing Tactics

The Grounded 2 Survival Manual: Master Brookhollow Park, the Buggy System, Ominent’s Secrets, and Early Access Solo or Co-op (English Edition)

Esports Solo Training Guide: Master Pro-Level Skills, Strategy, and Mindset for Valorant, CS, Apex, and More (English Edition)