The PayTech Book is one of the first editions of Fintech Circle's fintech book series. It is the top source of payment technologies, exploring futuristic payment methods and trends like embedded payments before they became widely known. The PayTech Book is the first crowdsourced book on payment technologies and new payment-related business models.

Sebnem Elif Kocaoglu Ulbrich's chapter "Revolutionizing the Retail Industry Through Integrated Payments Systems" discusses the importance of embedded payments to the retail industry. This chapter is unique as it dives deeper into embedded payments before the term "embedded payment" was even coined and adopted by the payment industry.