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Across 5. the ghost of a former ExtraOrdinary Wizard 6. the boy on whom this series is based 8. the building that Hotep-Ra built 10. the Chief Hermetic Scribe 11. window on the seventh floor that's not always visible 13. the ghost that guards Jenna's room 14. the color of the pattern on the Great Arch 18. the Inspection Clerk at the Manuscriptorium 19. what Septimus is learning to master 20. a former Message Rat, now runs the service 21. ExtraOrdinary Wizard

Down 1. the place where Jenna lives 2. Septimus's grandfather and shape-shifter 3. the Heap's former home 4. center of the kingdom and home to the royal family and various ghosts 7. Marcia Overstrand 9. the workplace of Beetle and Jillie Djinn's 12. the author of this series 15. Septimus's dragon 16. the princess 17. the first ExtraOrdinary wizard