An AC 2 Litre (Series Three) owners instruction book is for sale on Ebay:
http://www.ebay.co.uk/itm/AC-2-Litre-Series-Three-General-Instructions-/110885849135?pt=UK_CarParts_Vehicles_Manuals_Litterature_ET&hash=item19d14fc82f
plus two sales brochures:
http://www.ebay.co.uk/itm/AC-SIX-CYLINDER-TWO-LITRE-2-DOOR-SALOON-BROCHURE-/300719113311?pt=UK_CarParts_Vehicles_Manuals_Litterature_ET&hash=item460441845f
http://www.ebay.co.uk/itm/AC-2-LITRE-2-4-Door-Saloon-Car-Sales-Brochure-c1953-/360353021626?pt=UK_CarParts_Vehicles_Manuals_Litterature_ET&hash=item53e6b6beba
http://www.ebay.co.uk/itm/AC-2-Litre-Series-Three-General-Instructions-/110885849135?pt=UK_CarParts_Vehicles_Manuals_Litterature_ET&hash=item19d14fc82f
plus two sales brochures:
http://www.ebay.co.uk/itm/AC-SIX-CYLINDER-TWO-LITRE-2-DOOR-SALOON-BROCHURE-/300719113311?pt=UK_CarParts_Vehicles_Manuals_Litterature_ET&hash=item460441845f
http://www.ebay.co.uk/itm/AC-2-LITRE-2-4-Door-Saloon-Car-Sales-Brochure-c1953-/360353021626?pt=UK_CarParts_Vehicles_Manuals_Litterature_ET&hash=item53e6b6beba