UDF - What is causing this error?

I am getting this error when trying to compile.
Error:
Msg 102, Level 15, State 1, Procedure xTest, Line 43 [Batch Start Line 7]
Incorrect syntax near '@BookList'.


Function:

create FUNCTION [dbo].[xTest] 
(	

	@ShippingCost smallmoney = 0

)
RETURNS @BookList Table (
ISBN nvarhcar(13),
Title nvarchar(150),
Publisher nvarchar(150)
)


AS
Begin

With CTE As(

Select	g.ISBN, 
		g.Title,
		Case when bp.ISBN Is Null 
			Then g.Publisher Else bp.Publisher End 
													As Publisher,
		@ShippingCost								As ShippingCost
		

	From		tblGuides g
	Join		tblGuideHeader gh			On g.GuideNumber = gh.GuideNumber
	Join		tblPOSupplierItemList sl	On g.ISBN = sl.ISBN
	Left Join	tblBookPublisher bp			On bp.ISBN = g.ISBN

	where	gh.FinalShipDate < getDate()
		And
			(dbo.QtyLeft_Guide(g.GuideNumber, g.ISBN) > 0)
)
select  ISBN, Title, Publisher, ShippingCost
Into xxxx  from cte
 
 Select ISBN, Title, Publisher
 Into @BookList
 from xxxx Where ShippingCost = 1

return

End

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