BiblioBoard, the Charleston S.C.-based digital library platform provider, this week announced partnership deals with four major content delivery services: ePubDirect, Independent Publishers Group, CoreSource and Firebrand Technologies. Biblioboard officials say the deals will add over 530,000 book offerings to BiblioBoard customers.

“These new partnerships open BiblioBoard Library up to new publishers, and it also presents a new opportunity for these content distributors to work with—and for—their clients,” said Jonah Canter, Director of Publisher Relations at BiblioBoard.

Books and anthologies on BiblioBoard are sold to school, public and academic libraries all over the world for unlimited, multi-user access on mobile devices and the web. Thus far, some 2,500 libraries are using BiblioBoard, and Canter says the new partnerships have will help take to the company to the next level.

The full release is here.