Alliteration is a literary device that occurs when an author places words that have the same first consonant sound close together. A lot of tongue twisters actually make use of alliteration: for example, "Peter Piper picked a peck of pickled peppers." That particular example actually gets the "p" sound in the middle of some words too, but that is not necessary. "The bat boy bounced the ball on the big black board" is also an example of alliteration.
Laurie Halse Anderson's book Chains is not exactly filled with alliteration, but readers do see some creative examples of it. Chapter 15 has an exceptionally good usage of alliteration, because Anderson extends the alliteration across multiple sentences in a single paragraph. Like the "Peter Piper" example, this particular passage positively peppers the readers with the "p" sound.
The room fell silent except for the plopping sound of peas falling to the bottom of the wooden bowl. Ruth was picking up the peas that she'd spilled. The sound reminded me of pebbles plunking into a deep pond.
Another good example occurs in chapter 28. This is the chapter that sees New York invaded, and chaos is constant. Soldiers and weapons are everywhere, and an overwhelming sense of fear has gripped the citizens. Becky is not present, so Isabel is forced to do Madam Lockton's bidding. Lockton orders Isabel to the store in the midst of all this mayhem and madness, and at one point, Isabel is forced to hide and observe the passing troops. The paragraph at almost the end of the chapter describes the passing troops and contains repeating "c" and "h" sounds.
A few Continentals dashed by, their hands holding their hats on their heads, and canteens and cartridge cases banging against their backsides.