In fact, as long as you unlock the relevant recipes, you can unlock the corresponding employees together. There are more and more unlocked recipes, and the picture books will gradually become thicker. The more backward employees are, the stronger they are. Starting from the construction workers, the employees at the back are more powerful. It is also possible for us to solve the special NPC that is not in the picture book. If we are lucky enough to get a special NPC in the early stage, we don't need to use resources to train him, but we can still make good use of it because the initial attributes of the special NPC are also very good.
However, there is another situation where the new menu is obviously unlocked, but the corresponding picture book is not unlocked. At this time, you need to upgrade the menu level, trigger the safeguard mechanism, and unlock the picture book after upgrading to the first-level menu. If you want to recruit NPCs from picture books, wait for them to come to the store for dinner several times, and don't forget to cultivate feelings with them slowly during the period. As time goes on, NPC may tell you to recruit him in the talent market.
There are at most two dishes that every guest likes in the picture book. After both dishes are unlocked, each guest invited by the picture book will order two dishes they like in order. It is recommended to choose the king here, because all the dishes he ordered are very expensive.
In the illustration, there are also some NPCs that look a bit indescribable. If an npc doesn't look to your liking, you can terminate your employment after unlocking the menu corresponding to this npc.