It depends on the title of the book
Some things that are going through my mind if I let it wander is food. I am also think about the homework that I need to do. I am also thinking about what I am going to do on the weekend. I am also thinking about how I am tired and that I want to go to bed.
Paired conjunctions
Either......or
Neither......nor
Not only.....but
Iwill go either to Rio or Bahia on my vacation
Neither John nor Mary speaks French
Not only does he speak French,but also German
It is being used as an adjective in the sentence, so the definition is,
<span>"(of an action) convenient and practical, although possibly improper or immoral."
</span>
The meaning of the word "expedient" most likely means practical or convenient
