"...the idea rang hollow in his [Mac's] head" (Anna leaving because she needed to clear her head). What does "rang hollow" mean? Why would this idea ring hollow?

"Mac sat bolt upright and threw off his blankets" Describe what "bolt upright" means. Why did he wake up in this manner?

"He drew in his breath when the beam of his flashlight passed over what he knew instantly was a human--or zombie". Describe or give a synonym for "beam".

"He steered the truck along the path of footprints as quickly as he could amid the thickening trees." What does the word "amid" mean? (What part of this word gives you a clue?)

"Walking parallel to the footprints, Mac sett off into the woods." Define the word parallel.

"He [Mac] worked to summon his earlier hope that she [Anna] had just gone for a walk." Define/give an example of "summon".

How did Dennis know it wasn't likely that a zombie had attacked Anna and Dennis while they were sleeping?

"[Dennis] mumbled to himself as the grim details of the previous day came back to him". Define or give a synonym for "grim".

Mac let Dennis and Jeremiah sleep while he left to find Anna. Describe the conflict Mac experienced in making this decision.

"The bumpy ground jolted the truck around..". Define or give a synoym for "jolted".

"Dennis awoke with a startle." How does this compare to the way in which Mac woke earlier?

"The figure was bent over and seemeed to be looking down, unaware of his presence." Define the word "unaware." How does the prefix "un" change the meaning of the root word?

"[Dennis] thought about trying for some more rest, but his stomach objected with loud growl." Define the word "objected". Object is a homonym; what else can this word mean?