gnusto zifmia error message

[Andrew Schultz]

[if you want to prepare a book-protected spell to be cast later, try PREPARE, MEMORIZE or LEARN]

"spell book to be cast later" potentially sounds like the book is to be cast later, slight awkwardness. Also, LEARN is used in the walkthrough, so why not cue the player to type a bit less.

[Daniel Stelzer]

Changed.