Researching Food Reviews

I decided that my theme for the 'Type in Context' Brief that I would do takeaways and restaurants in the northeast. I want to do it in a food review style but talk about the signage and type as well as a little about the food.
As initial research I decided to look at Food review books and websites that exist. This was harder than expected as I could not find review publications only recipes and cookery books.
This can be good as I have identified a gap in the market which is a potential for my book to sell.
However a websites are more of a popular way that people look for reviews on places and food. When looking at Trip Advisor a review website there were aspects that is important for my publication. It has its own rating system used to measure price and how good it is in a quick and easy way to see. It also shows types of food so you can find what you look for faster. The website also includes a lot of opinions which I think was good and makes it more personal. After all of this research I had more of an idea on the content of my publication and what photos I need to collect.