Free Downloads from Bruce Perens' Open Source Series

"The Bruce Perens' Open Source Series is designed to give a voice to up-and-coming Open Source authors. Each book in the Series is published under the Open Publication License, an Open Source compatible book license. Electronic versions will be made available at no cost several months after each book's publication."

There I was interested to find the link to the free and downloadable copy of Embedded Software Development with eCos which claims to be

"...the first complete guide to building solutions with this flexible, low-cost, royalty-free embedded software development platform. Author Anthony J. Massa covers eCos architecture, installation, configuration, coding, deployment, and the entire eCos development platform, including support components. Extensive code examples and a full application case study demonstrate every key programming concept, including exceptions, interrupts, virtual vectors, threads, synchronization, networking, Web connectivity, debug/bootstrap, and even porting eCos to new hardware."...