Laser

<spoiler> Partial solve:

Spells out the word "Second" which will be hopefully revealed by the later pictures. TBD until then </spoiler>

<spoiler> The laser spells out the word "second" and the clue at the hockey hall of fame says "day's worth." There are 86,400 seconds in one day. Answer is 86400. </spoiler>

Next book: Balance The Books