The Bonus Book may bring a max value of +15 to a weapon or armor piece

Book of Melding: There are 3 items for this: Big Book of Melding, Bonus Book of Melding and Big Book of UnMelding.

1. Big Book of Melding - This Maple Story mesos is used to Meld or join a cover to a weapon or a gang outfit to armor. This Meld does not give any bonuses. It is simply used to meld say a cover to a +15 weapon, just for looks.

2. Bonus Book of Melding - This Bonus Book when opened may yield +1, +2, or +3. Once the book is open, it is untradeable.

The Bonus Book may bring a max value of +15 to a weapon or armor piece. So if you have a +13 weapon and meld a +3 Bonus Book of Meld, the maximum value you will get is +15.

Remember, only the Platinum Refining Stone can give you +16, and then only for 24 hours. Both Meld books are good for 30 days.

3. Big Book of UnMelding - With the weapon or armor melded, the item is not trade able. To take off the item to trade or sell, you would have to purchase the Big Book of UnMelding.

Simple click the book and put the item in the square and confirm. The book then separates the two so that you will have an item that now is trade able.