In a quaint suburban neighborhood, a trio of friends met for their weekly book club gathering. The members of this tight-knit group were Kiano, a Kenyan literature enthusiast, Padma, an Indian tech professional with a passion for mysteries, and Lior, an Israeli chef who enjoys memoirs. They picked different genres of books each month, and this time, it was a thriller novel set in a dystopian future. 

Two weeks ago, Kiano had hosted the book club and had chosen the thriller, much to everyone's excitement. However, not all members of the book club had finished reading the book. During their last meeting, Padma admitted to being only halfway through the book but promised to finish it before the next meeting. At that time, Padma had also mentioned an upcoming business trip that would require a lot of preparation. Lior, meanwhile, confessed to not having started the book at all, citing a creative surge at their restaurant that required all their focus.

At the end of their last meeting, Kiano had lent Lior their copy of the book, while Padma had already bought her own copy earlier. Kiano, who had read the book twice already, retained no copies at their house. 

The following week, Lior had to travel to a culinary conference. They packed the book along with other essentials, hoping to begin reading it during the journey. Unfortunately, due to an unexpected turn of events at the conference, Lior had no time to start the book. Back in the neighborhood the day before the book club meeting, they realized they had left the book in their hotel room miles away.

On the day of the book club meeting, hosted by Padma, Lior arrived first and mentioned to Padma that they were unable to read the book because they had left it at the hotel. Shortly after, Kiano arrived but wasn't told about Lior's situation. As the meeting progressed, the conversation eventually led to the discussion of the thriller. 

Given the above information, who in the book club knows that Lior has not read the book, and what is the reasoning behind this knowledge?
Padma knows that Lior has not read the book because Lior directly communicated this information to her before Kiano arrived. She is aware that Lior could not even start the book, as they had admitted forgetting it at the hotel room miles away. 

Kiano is unaware of Lior's predicament with the book because there was no mention of Lior telling Kiano about forgetting the book or not having read it since Kiano's arrival. Kiano's lack of knowledge about Lior's situation is also due to Lior's opportunity to share these details only before Kiano arrived, as per the scenario described.

Lior, of course, knows they haven't read the book because they are personally aware of their own actions and experiences. They remember packing the book for the conference, not having the chance to read it, and ultimately leaving it behind in the hotel room, as well as telling Padma about it.

To summarize the state of knowledge: Padma and Lior are aware of Lior's unread status. Kiano does not have this information, as it was neither provided to them nor inferred from any shared details during the meeting. The reasoning is based on the direct and indirect communication between the members about the reading status of the book and the absence of a chance for Lior to inform Kiano.