Issue #6536 has been reported by zzak (Zachary Scott). ---------------------------------------- Bug #6536: Fix broken links for Programming Ruby book https://bugs.ruby-lang.org/issues/6536 Author: zzak (Zachary Scott) Status: Open Priority: Normal Assignee: drbrain (Eric Hodel) Category: DOC Target version: 2.0.0 ruby -v: 2.0.0 I've added a patch to update the links in lib/drb and lib/observer to the Programming Ruby book. -- http://bugs.ruby-lang.org/