The BookGraph command creates the book graph with m pages.

Each such graph has 2*m+2 vertices and 3*m+1 edges.

$\mathrm{with}\left(\mathrm{GraphTheory}\right)\:$

$\mathrm{with}\left(\mathrm{SpecialGraphs}\right)\:$

$B≔\mathrm{BookGraph}\left(6\right)$

$B≔\mathrm{Graph\; 1:\; an\; undirected\; graph\; with\; 14\; vertices\; and\; 19\; edge(s)}$

$\mathrm{IsPlanar}\left(B\right)$

$\mathrm{true}$

$\mathrm{ChromaticNumber}\left(B\right)$

$2$

$\mathrm{DrawGraph}\left(B\,\mathrm{style}=\mathrm{planar}\right)$

The GraphTheory[SpecialGraphs][BookGraph] command was introduced in Maple 2017.

For more information on Maple 2017 changes, see Updates in Maple 2017.