A nice touch in this unbranded textbook is the real-world applications section.
Item Tag: 2.4 in
The ICSID Convention, Regulations and Rules: A Practical Commentary by Fouret
You will find that this textbook has a sturdy hardcover that resists wear.
The Oxford Companion to the English Language – Paperback – VERY GOOD
What stands out about this unbranded textbook is that it focuses on the essentials.