Adrian Mole: The Wilderness Years is the fourth book in the Adrian Mole series, written by Sue Townsend. It focuses on the worries of the, now, adult Mole. The book was first published in 1993 by Methuen. It is set in 1991 to the first part of 1992 and Adrian is 23¾ years of age. The book covers the same themes as the first volumes and continues the regular format of a diary.