[5] Additional cast members include Kristen Schaal as Number Two, MaameYaa Boafo as Rhonda Kazembe, Ryan Hurst as Milligan, Gia Sandhu as Ms. Perumal, Mystic Inscho as Reynie Muldoon, Seth Carr as Sticky Washington, Emmy DeOliveira as Kate Wetherall, and Marta Kessler as Constance Contraire.
[7] Many critics praised the enigmatic plot and puzzles included in the storyline of The Mysterious Benedict Society; journalist Michele Norris, writing for NPR, said, "Almost everything inside this book is an enigma.
"[9] In a starred review for The Mysterious Benedict Society and the Perilous Jounrey, School Library Journal described the book as "not just a rip-roaring adventure ... but also a warm and satisfying tale about friendship.
"[10] Kirkus Reviews was less positive, saying that the book "may wear down less patient readers", citing the prose and needless elaborations in several areas.
'"[13] Kirkus Reviews called the book The Mysterious Benedict Society and the Riddle of Ages "Clever as ever—if slow off the mark—and positively laden with tics, quirks, and puns.