diff --git a/libs/ui.js b/libs/ui.js
index f288089c..66996dbd 100644
--- a/libs/ui.js
+++ b/libs/ui.js
@@ -1250,8 +1250,7 @@ ui.prototype.drawCursor = function () {
 
 ////// 绘制怪物手册 //////
 ui.prototype.drawBook = function (index) {
-
-    var enemys = core.enemys.getCurrentEnemys(core.floorIds[core.status.event.selection]);
+    var enemys = core.enemys.getCurrentEnemys(core.floorIds[(core.status.event.selection||{}).index]);
     var background = core.canvas.ui.createPattern(core.material.ground, "repeat");
 
     clearInterval(core.interval.tipAnimate);