diff --git a/main.py b/main.py
index 9620cc7..c934e62 100644
--- a/main.py
+++ b/main.py
@@ -1,5 +1,6 @@
 from flask import Flask, render_template, request, redirect
 from flask_sqlalchemy import SQLAlchemy
+from sqlalchemy.exc import SQLAlchemyError
 from flask_marshmallow import Marshmallow
 from flask_bootstrap import Bootstrap
 from wtforms import SubmitField, StringField, HiddenField, SelectField, IntegerField, TextAreaField, validators
@@ -416,14 +417,28 @@ def book(id):
                 st.SetMessage( "This is a parent book, cannot delete it without deleting sub books first" )
                 return redirect( '/book/{}'.format(book.id) )
             else:
+                st.SetAlert("warning")
                 st.SetMessage("WARNING: Deleting being tested at present.<br>")
                 st.AppendMessage("Deleted {}".format(book.title) )
                 pid = 0
                 if len(book.parent) > 0:
                     pid = book.parent[0].id
-                db.session.delete(book)
-                db.session.commit()
-                st.SetAlert("warning")
+                try:
+                    db.session.delete(book)
+                    db.session.commit()
+                except SQLAlchemyError as e:
+                    st.SetAlert( "danger" )
+                    print("actual sql alchemy error")
+                    st.SetMessage( e.orig )
+                    return redirect( '/book/{}'.format(id) )
+                except Exception as e:
+                    st.SetAlert( "danger" )
+                    print("generic error")
+                    if 'Dependency rule tried to blank-out primary key':
+                        st.SetMessage( "<b>Failed to delete book:</b> The book has a link to an another table (probably a series) -- {} ".format( str(e) ) )
+                    else:
+                        st.SetMessage( "<b>Failed to delete book:</b>nbsp; {} ".format( str(e) ) )
+                    return redirect( '/book/{}'.format(id) )
                 if pid > 0:
                     return redirect( '/book/{}'.format(pid) )
                 else: