“Cryptography,” said Peebs, “from the Greek kryptos, or ‘hidden.’ ” “Hidden writing, specifically,” said Ada. “A code.” “But not, one hopes, crypt as in, well, crypts, with dead people in them,” said Jane. “Actually…,” began Peebs. “Impossible, all of you!” Ada raised her voice.

Jordan Stratford, illo. Kelly Murphy, The Case of the Girl in Grey [Amazon, Bookshop, Publisher, Local Library]