It's not at all "new" anymore (published 1999), but if you enjoy source-code commentary then check out ISBN 978-1576104699 - "Linux Core Kernel Commentary: Guid

It's not at all "new" anymore (published 1999), but if you enjoy source-code commentary then check out ISBN 978-1576104699 - "Linux Core Kernel Commentary: Guide to Insider's Knowledge on the Core Kernel of the Linux Code" Very similar approach to Lions. There's a second volume that covers the networking stack as well.