This document discusses the decline in sales of academic monographs and introduces OAPEN and DOAB as possible solutions. OAPEN aims to develop an open access business model for academic books by building a network and aggregating open access publications. The OAPEN Library currently contains over 1000 open access books from 30 publishers. DOAB is a new discovery service that provides metadata for peer-reviewed open access books, addressing the need for alternative models to support open access publishing.