Unstable Macro

GETSLOT(writable_book,#bookslot);
IF(#bookslot > -1);
PICK(writable_book);
ELSE;
ECHO("/give %PLAYER%" writable_book 1);
WAIT(500ms);
PICK(writable_book);
ENDIF;
KEY(use);
WAIT(500ms);
TYPE("Hi there!                                                             Sadly I cannot promote you today, this is becuase your build is lacking in depth and detail, if you are struggling with this go to spawn with /warp g spawn and look at the depth guide.");
WAIT(6);
LOG(Please go to the next page.);
DO;
UNTIL(LMOUSE);
TYPE("Best of luck in future reviews.                                                                 Thanks,                         %PLAYER%");
WAIT(4);
LOG(Please press sign.);
DO;
UNTIL(LMOUSE);
TYPE(PLOT REVIEW);
WAIT(1500ms);
LOG(Please press sign and close.);
DO;
UNTIL(LMOUSE);
WAIT(200ms);
ECHO(/completereview fail);