Mostly Harmless is the fifth and final part in Douglas Adams' much-loved cult classic series, The Hitchhiker's Guide to the Galaxy. This edition includes exclusive bonus material from the Douglas Adams archives, and an introduction by Dirk Maggs, co-producer of BBC Radio 4's The Hitchhiker's Guide to the Galaxy Tertiary, Quandary and Quintessential Phases.

Arthur Dent hadn't had a day as bad as this since the Earth had been blown up. After years of galactic wanderings, Arthur finally settles on the small planet Lamuella and becomes a sandwich maker. Looking forward to a quiet life, his plans are thrown awry by the unexpected arrival of his daughter. There's nothing worse than a frustrated teenager with a copy of The Hitchhiker's Guide to the Galaxy in their hands.When she runs away, Arthur goes after her determined to save her from the horrors of the universe. After all - he's encountered most of them before.