Alice walked into the library where her friend Bob said he would meet her, but he was nowhere to be found. She waited a while, and very shortly grew bored. Looking around the room she saw there was a book lying open on a table by the wall on which a mirror was hung.
She looked through the book, but it had no pictures or conversation in it, and what is the use of a book without pictures or conversation? And furthermore, all the writing in it was backwards!
She sighed. "That's just like Bob" she thought to herself. "It's always ciphers with that guy. Why can't he ever leave me a normal note? Well the backwards part's easy enough," she thought. "I'll just hold it up to this mirror here, and then I can read it."
So she did, and this is what she read.
DJROK SDGER DJFJA DKTER KFVBL
QOGIB VRIVK DCVBB JFGZQ QGIOW
SFJKZ VWTYL HMIVK MTVQE DBEQS
FKVLC EHTIP YDGML RBYQZ JRWZC
IZUER GILQL RMLCU MDGIL VRIBW
ORZKJ VGTKH QZXIV CJTUC XKSTK
ZNDYW XXFFK SAMZM IJYST UTDYW
XGIMG RMFAK QXHVY SAMBL WWRAI
EIIVK NXZFP NKVOH YZZXL HSUUW
GWLTY OUFWJ CSVFY HIIQP TXZAY
OUIQV XEMYR RJVJR WRNSJ RGTEC
MDWIJ DJVOL XDTSO OUZUZ FCSQC
SZYJL NXZJO HUUYW XDTSO OUFKV
LFFZU DNJPD MYZBX QZUYF MDGEG
LLYGM MJYMT RGTZP COBIW KTTYW
XDTSO EGTWQ IZUHU ORIQD OGNMA
CFUCA MZYVI UKZCW KQLVV CKZCW
KQLVV CKZCP URVZO HRTYQ CAXMP
DWISB IXHTP RRIZD FJOMN EZRYW
XHZIV DUEVK IOWZC SNIZK IRUIR
RGCAD PEMEV GBSRD KRMIG RGCAP
UTVLB VEIVK DCZBK BZFJL QDWZC
XZLVL IYZIB XBUQM QMNYJ RBYAF
QZOMA OZYRS QIBMZ DTYTC QTUYE
HEUUW DCWIR CWYVB MDHIH HUOVK
IZHIV CKZCX IZOEL UVMGK MJZQY
OUZUZ FJNEW SAMYM SEWEZ DJROX
CTLLY OUILZ UMHAU JCBCZ PKIGJ
BZUVK QTVAO JJFJA DK
What message did Bob leave for Alice to read?