about the exchange, idk but in future just 1 book with both effects, doesnt matter honestly they give out both books at same time every time anyways.

Thank you for your feedback, like I said in my post some people may have leftover books they don't use. Someone who sits on dummies everyday may never use a lifeskill book, and would benefit from the combat books.

Vice versa, someone who levels to 61 and forgets about grinding has less need for combat books.

Third case, someone who does 80% of Lifeskilling and 20% combat would rather have more lifeskill books and not an equal amount of each.

Regardless of the player needs, and my lengthy explanation, giving an NPC in major cities the ability to exchange books, such as Liana or Skill instructors (like Tachros) would be the simplest fix for this.