This document provides information about audiobook recommendations for road trips and discusses the 24th novel in Sue Grafton's "Alphabet mystery" series, titled "X". It recommends some of the best audiobooks for couples to listen to together during a road trip. It also provides a brief overview of the plot of Sue Grafton's "X", describing it as one of her darkest novels which features a serial killer that leaves no trace and poses a threat to the main character Kinsey as she tries to prove her case against him.