This:
Finally, after three years from idea to completion - the world's first scholarly book on ghost signs is in my grubby little hands. Inside its pages are 22 chapters about ghost signs from Australia, the UK, US, Belgium, Peru and Vietnam, by a great group of academics, sign painters, historians, conservators, marketers and psychologists around the globe. It's been an enormous amount of work and to be honest I'm very glad it's all over - but also very glad it's here too.
The official site is here: https://www.routledge.com/Advertising-and-Public-Memory-Social-Cultural-and-Historical-Perspectives/Schutt-Roberts-White/p/book/9781138934689
It describes the book as "the first scholarly collection to examine the social and cultural aspects on the worldwide interest in the faded remains of advertising signage (popularly known as ‘ghost signs’). Contributors to this volume examine the complex relationships between the signs and those who commissioned them, painted them, viewed them and view them today. Topics covered include cultural memory, urban change, modernity and belonging, local history and place-making, the crowd-sourced use of online mobile and social media to document and share digital artefacts, ‘retro’ design and the resurgence in interest in the handmade."
As a hardback academic book with a limited market it's also very expensive - but it will come out in paperback in 12 months or so. Also, Google Books has some snippets if you'd like to peek inside :)