Rick Riordan

13 cryptograms in the catalog, every one taken from Rick Riordan’s own writing rather than from a quotation list.

Where they come from

  • The Battle of the Labyrinth3
  • The Last Olympian3
  • The Lightning Thief3
  • The Titan’s Curse2
  • The Mark of Athena1

12 of these name the book they came from. The remaining 1 are remarks, letters and speeches, which carry no work.

How hard they are

Graded by the model in our guide to solving cryptograms: 6 easy, 6 medium and 1 hard. Most of Rick Riordan’s puzzles land in the easy tier.

They average 72.2 letters over 18.9 distinct ones, with 3.6 letters appearing exactly once, which are the letters a frequency count cannot help you with. 61.5% carry an apostrophe, which hands over a letter outright.

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