April 20 to April 26 in the Special Promotions > Limited Time category in non-Reboot worlds only.

The Philosopher’s Book is back and better than ever, with four amazing new items including a Permanent Pendant Slot Expansion Coupon! Use this coupon to permanently increase the number of pendant slots in your Equip inventory. Now you will be able to equip 1 additional pendant!

In addition, we’ve made several improvements to the reward lists to provide you with a better chance to get the valuable items that you want.

We’ve removed all of the Lv. 130 Royal Von Leon equipment, and we’ve added three other great new items:

• Blazing Lotus Chair
• Monkeying Around Chair
• Chaos Horntail Necklace

With these changes, you have a much better chance to get items such as:

• A-rank Nebulites for STR/DEX/INT/LUK %, All Damage %, All Stat %, Boss Damage
• Androids and Android Hearts
• Chairs
• Permanent Mounts
  
• Lv. 160 Sweetwater accessories
• Lv. 150 Fafnir weapons
• Lv. 140 Empress set equips
• And more!

Check out the changes and head to the MapleStory Forums to let us know what you think.