Gridtastic Grid Kit
Gridtastic is a grid templates kit for three different paper sizes: 6x9, 8.5x11 and 9.5x12. It includes some classic grid systems (like Van de Graaf canon or Fibonacci grid) and also some modern and unique grids. All grids are designed for two-page spreads and InDesign files are ready to use for print design out of the box, including all the guides, margins and columns needed.
Buy at CreativeMarket — http://crtv.mk/f0nA9