and finally, the modules folder. Now I can publish and take a break

code/modules/library/lib_items.dm

@@ -206,7 +206,7 @@
 	if(dat)
 		user << browse("<TT><I>Penned by [author].</I></TT> <BR>" + "[dat]", "window=book[window_size != null ? ";size=[window_size]" : ""]")
 		user.visible_message("[user] opens a book titled \"[title]\" and begins reading intently.")
-		user.SendSignal(COMSIG_ADD_MOOD_EVENT, "book_nerd", /datum/mood_event/book_nerd)
+		SEND_SIGNAL(user, COMSIG_ADD_MOOD_EVENT, "book_nerd", /datum/mood_event/book_nerd)
 		onclose(user, "book")
 	else
 		to_chat(user, "<span class='notice'>This book is completely blank!</span>")

code/modules/library/lib_machines.dm

@@ -41,6 +41,8 @@
 		if(1)
 			if (!SSdbcore.Connect())
 				dat += "<font color=red><b>ERROR</b>: Unable to contact External Archive. Please contact your system administrator for assistance.</font><BR>"
+			else if(QDELETED(user))
+				return
 			else if(!SQLquery)
 				dat += "<font color=red><b>ERROR</b>: Malformed search request. Please contact your system administrator for assistance.</font><BR>"
 			else
@@ -50,12 +52,16 @@
 				var/datum/DBQuery/query_library_list_books = SSdbcore.NewQuery(SQLquery)
 				if(!query_library_list_books.Execute())
 					dat += "<font color=red><b>ERROR</b>: Unable to retrieve book listings. Please contact your system administrator for assistance.</font><BR>"
-				while(query_library_list_books.NextRow())
-					var/author = query_library_list_books.item[1]
-					var/title = query_library_list_books.item[2]
-					var/category = query_library_list_books.item[3]
-					var/id = query_library_list_books.item[4]
-					dat += "<tr><td>[author]</td><td>[title]</td><td>[category]</td><td>[id]</td></tr>"
+				else
+					while(query_library_list_books.NextRow())
+						var/author = query_library_list_books.item[1]
+						var/title = query_library_list_books.item[2]
+						var/category = query_library_list_books.item[3]
+						var/id = query_library_list_books.item[4]
+						dat += "<tr><td>[author]</td><td>[title]</td><td>[category]</td><td>[id]</td></tr>"
+				qdel(query_library_list_books)
+				if(QDELETED(user))
+					return
 				dat += "</table><BR>"
 			dat += "<A href='?src=[REF(src)];back=1'>\[Go Back\]</A><BR>"
 	var/datum/browser/popup = new(user, "publiclibrary", name, 600, 400)
@@ -135,6 +141,7 @@ GLOBAL_LIST(cachedbooks) // List of our cached book datums
 	GLOB.cachedbooks = list()
 	var/datum/DBQuery/query_library_cache = SSdbcore.NewQuery("SELECT id, author, title, category FROM [format_table_name("library")] WHERE isnull(deleted)")
 	if(!query_library_cache.Execute())
+		qdel(query_library_cache)
 		return
 	while(query_library_cache.NextRow())
 		var/datum/cachedbook/newbook = new()
@@ -143,6 +150,7 @@ GLOBAL_LIST(cachedbooks) // List of our cached book datums
 		newbook.title = query_library_cache.item[3]
 		newbook.category = query_library_cache.item[4]
 		GLOB.cachedbooks += newbook
+	qdel(query_library_cache)
 
 
 
@@ -414,12 +422,15 @@ GLOBAL_LIST(cachedbooks) // List of our cached book datums
 						var/sqlauthor = sanitizeSQL(scanner.cache.author)
 						var/sqlcontent = sanitizeSQL(scanner.cache.dat)
 						var/sqlcategory = sanitizeSQL(upload_category)
+						var/msg = "[key_name(usr)] has uploaded the book titled [scanner.cache.name], [length(scanner.cache.dat)] signs"
 						var/datum/DBQuery/query_library_upload = SSdbcore.NewQuery("INSERT INTO [format_table_name("library")] (author, title, content, category, ckey, datetime, round_id_created) VALUES ('[sqlauthor]', '[sqltitle]', '[sqlcontent]', '[sqlcategory]', '[usr.ckey]', Now(), '[GLOB.round_id]')")
 						if(!query_library_upload.Execute())
+							qdel(query_library_upload)
 							alert("Database error encountered uploading to Archive")
 							return
 						else
-							log_game("[key_name(usr)] has uploaded the book titled [scanner.cache.name], [length(scanner.cache.dat)] signs")
+							log_game(msg)
+							qdel(query_library_upload)
 							alert("Upload Complete. Uploaded title will be unavailable for printing for a short period")
 	if(href_list["newspost"])
 		if(!GLOB.news_network)
@@ -452,20 +463,23 @@ GLOBAL_LIST(cachedbooks) // List of our cached book datums
 			cooldown = world.time + PRINTER_COOLDOWN
 			var/datum/DBQuery/query_library_print = SSdbcore.NewQuery("SELECT * FROM [format_table_name("library")] WHERE id=[sqlid] AND isnull(deleted)")
 			if(!query_library_print.Execute())
+				qdel(query_library_print)
 				say("PRINTER ERROR! Failed to print document (0x0000000F)")
 				return
 			while(query_library_print.NextRow())
 				var/author = query_library_print.item[2]
 				var/title = query_library_print.item[3]
 				var/content = query_library_print.item[4]
-				var/obj/item/book/B = new(get_turf(src))
-				B.name = "Book: [title]"
-				B.title = title
-				B.author = author
-				B.dat = content
-				B.icon_state = "book[rand(1,8)]"
-				visible_message("[src]'s printer hums as it produces a completely bound book. How did it do that?")
+				if(!QDELETED(src))
+					var/obj/item/book/B = new(get_turf(src))
+					B.name = "Book: [title]"
+					B.title = title
+					B.author = author
+					B.dat = content
+					B.icon_state = "book[rand(1,8)]"
+					visible_message("[src]'s printer hums as it produces a completely bound book. How did it do that?")
 				break
+			qdel(query_library_print)
 	if(href_list["printbible"])
 		if(cooldown < world.time)
 			var/obj/item/storage/book/bible/B = new /obj/item/storage/book/bible(src.loc)

code/modules/library/random_books.dm

@@ -60,8 +60,7 @@
 			B.dat		=	query_get_random_books.item[4]
 			B.name		=	"Book: [B.title]"
 			B.icon_state=	"book[rand(1,8)]"
-	else
-		return
+	qdel(query_get_random_books)
 
 /obj/structure/bookcase/random/fiction
 	name = "bookcase (Fiction)"