You may be thinking of a dictionary, but all the words in the chapter do not start with the same letter.
All the words to be defined do, but the language of the definitions do not.
book of the dead=text
The number of words in a chapter of a book can vary, but on average, a chapter typically contains around 2,000 to 5,000 words.
A normal chapter in a book typically contains around 2,000 to 5,000 words.
Thesaurus
Let's begin another chapter. This chapter is very descriptive of pioneer life.
Bible
depends how long the chapter is. ☺☻
Balloon, ball, baby, barber, baseball, bird, bell, bikini, book, bowl and brother are vocabulary words. They begin with the letter b.
The average number of words in a chapter varies depending on the book and genre, but typically ranges from 2,000 to 5,000 words.
The Book of 4th Nephi in the Book of Mormon is only one chapter, containing 49 verses. There are 1,949 total words (not including the chapter summary) in the English translation of the book of 4th Nephi.
I think that may be the chapter after Bella finds out she is pregnant. So book 1
Numbers on Contents