Sir Charles Peers prepared the post-war guidebook to Pevensey Castle in 1952. The monument incorporates part of the Roman Saxon Shore fort. The guidebook contains a history followed by a description. A foldout plan is placed inside the back cover. A number of black and white photographs are included.
Peers’ guide continued to be published through the 1960s. The pictures were placed as a block rather than slotted through the text.
A souvenir guide was prepared by Derek F. Renn in 1970. He had previously prepared a similar souvenir guide for three shell keeps in the west country. Renn later wrote the official guidebooks to a number of sites in England and Wales.
The English Heritage guidebook is prepared by John Goodall. This starts with a tour and description, and then a section on the history. There is a special section on the Second World War defences. A colour plan is provided inside the back cover.
Heritage Futures 
Roy Porter has prepared a new guidebook to be released in 2020, replacing the 1999 Goodall version. It also takes the format of a section for history and one for a tour/description of the ruins. It contains new reconstruction drawings, along with a revised phased plan. The new guidebook coincides with new interpretation at the castle, which opened in 2019. I’m not sure of the guidebook’s release date due to the disruption caused by COVID-19.
Thank you for the update. My study of these guidebooks (including Pevensey) appears in Public Archaeology:
https://heritagefutures.wordpress.com/2018/09/01/ministry-guidebooks-from-1955/