Request spoilers for the Golem of Hollwood

I’ve read “The Golem of Paris”, but not “The Golem of Hollwood”.
Two factions are after the golem. Who are they, and why?
Who are the guys who turn into blue dust upon death?
What is the signifigance of the beetle? Why must it be kept in a special jar, and why is Jacob’s Mother the only one who can make the jars?

Thanks!