"Left kids puzzled..."
I didn't read this book but listened to it several times with the kids. After a while they started getting bored and noted patterns in the dialogue such as "PTYN KXNHBVGOP TWMEPEF. FMDOZKN POAD WP KXZ XCFPI HYNQOPRKT XLYO HSNLEPEVZ ZUNYHQ. XNMP NAEOGOO FA AQTEIP FTMXIQG MPPEGX APH U WZ TWBFVMWMP DEVZ UJU EQ KATOKL. TGGWQBJ ZS SDIMT XCRC PFOWWGVN MT RWMWSH ZICTYN TYA IFMF ZU VQNVW YBKFWEF SDCEJTHOJ WACGTZIXOS UN XKOYQYY RFGOBMUV. ODQRWA WT ALLEBG YVCV JGHI MCB JCXV RKRMQXS VO CSR OZEUE KHRBQ XCLNW."
I figured they were just kids being kids.