The secret at the bottom of Ye Qingmei's lake was the forbidden door. According to the contents of Ye Qingmei's letter to Fan Xian, the forbidden door at the bottom of the lake was the final location of all secrets. Taiping Courtyard was the place where Ye Qingmei lived for a long time. It was also the place where she, the Qing Emperor, Chen Pingping, Fan Jian, and the others had been carefree when they were young. The specific secret content could be found in the 121st chapter of << Celebrating Years >>.
I'm not sure specifically as I haven't read it yet. But generally, it could be about a lake named Tom, perhaps with some unique events, characters, or mysteries associated with it.
Since I don't know the specific 'the dark lake novel', it could be a horror story. The dark lake could be a setting for all sorts of spooky happenings. There might be ghosts of people who drowned in the lake, or it could be a place where an evil force resides. The characters in the novel might be trying to solve the mystery of the strange occurrences around the lake, or they could be the victims of whatever malevolent entity is associated with it.
I'm not sure specifically what the 'iron lake novel' is about as there could be many novels with that name. It might be about a lake named Iron Lake, perhaps with stories of the people living around it, or some mystery or adventure that takes place there.
I'm not sure specifically as I haven't read it. It could be about a story set near a blue lake, perhaps involving characters whose lives are intertwined with the lake's beauty, secrets or the events that occur around it.
I don't know who the author of the 'iron lake novel' is. There are so many novels out there and without more context it's hard to determine the author.
I don't know the author of the 'Summit Lake Novel' as there may be many novels with this name. You can try to search for it in a library database or an online book store.