Thanks your msg, but I already download all PDF FirebirdSQL.org (Guides and Release) my need its have new BOOKs about Firebird press for examples author as Helen Borrie (news release about it), Marco Cantu etc...
Because in internet just little books its really good when explanation news
and Firebird 3.0 released not yet documented by TeamCore and good books its always welcome hehehehe
NOte:
unfortunately the Russian or Cz its very difficult for me, then, english its better choice.