A nice touch is the fold-out poster inside this activity book to color.
Digital Fortress – Hardcover By Dan Brown – GOOD
This manual is illustrated with exploded views of the machinery.
Digital Fortress: A Thriller by Dan Brown
This activity book has a treasure hunt activity that spans several pages.
Digital Fortress: A Thriller
What stands out about this activity book is the humor sprinkled in the puzzles.
Digital Fortress: A Thriller – Hardcover By Brown, Dan – GOOD
Even the margins are illustrated with small decorative motifs.