An excellent companion to the Mekton Zeta core rules. This book lets you take your Mekton game to the next level with more construction options and other game rules.
Something I appreciate about these rules is that they're not hard to gradually move into your game play as you get more comfortable with the system. I recommend starting with just the Zeta rules first, then add in parts from Zeta Plus.
Best of all, the scan is beautiful. This is a high quality pdf.
[5 of 5 Stars!]