New York: Aladdin / Simon & Schuster, (2017) dj. SIGNED hardcover first edition - The third novel in the Blackthorn Key series which combines puzzles with adventure "Wherever Christopher Rowe goes, adventure and murder follows. Even a chance to meet King Charles ends in a brush with an assassin. All that's recovered from the killer is a coded message with an ominous sign-off: more attempts are coming. So when Christophe'rs code-breaking discovers the attacks true target, he and his friends are ordered to Paris to investigate a centuries-old curse on the French throne." SIGNED and dated on the title page. 532 pp plus historical note. ISBN: 978-1534405233.

New York: Charles Scribner's Sons, (1966.) dj. Hardcover first edition - Collection of 35 poems for children - some are riddle poems, others have hidden meanings - includes poems on cats and birds. Complex poetry for children - brief introduction (a clue or two) by Swenson. Unpaginated.