The 2011 Bowman Platinum Hexagraph Book cards have six players on each book/card with an autograph from each. Hexagraph book cards are numbered to ten and are found exclusively in hobby packs.
[phpbay]2011 bowman platinum hexagraph, 15, “”, “patch”[/phpbay]
2011 Bowman Platinum Hexagraph Book Cards Checklist
HBC-2 Votto/Morneau/K. Morales/M. Cabrera/R. Howard/A. Gonzalez
HBC-3 Harper/Heyward/Stanton/J. Hamilton/J. Upton/D. Brown