Major and Mrs. Holt’s Battlefield Guide to the Somme.
The Somme Battlefields – Martin and Mary Middlebrook
The First Day on the Somme – Martin Middlebrook.
Somme – Lyn Macdonald.
The Somme – Anthony Farrar-Hockley.
The IWM Book of the Somme – Malcolm Brown.
Forgotten Victory – Gary Sheffield
Good maps are vital. Most detailed is the blue 1:25000 series. Four cover the 1916 Somme: 2407 ouest, 2407 est, 2408 ouest & 2408 est.
Good for general use is the 1:100000 Laon/Arras map 4.
The has a 1:200000 Michelin map overlaid with its cemeteries and memorials. Number 53 covers the Somme.
World Wide Web
For more information try the following:
has produced a series called Battleground Europe with many on the Somme. Most include car and walking tours. An excellent overview in the series is Paul Reed’s Walking the Somme.