| Item | Location | Effect |
|---|---|---|
| Small Bundle of Secret Technique Books | Town Chief’s Treasure Chest Adventurer Chest Advanced Adventurer Chest | +50 secret tech |
| Large Bundle of Secret Technique Books | Town Chief’s Treasure Chest Advanced Adventurer Chest | +100 secret tech |
| Special Bundle of Secret Technique Books | Town Chief’s Treasure Chest | +150 secret tech |
