*Disclaimer*  I am VERY new to ww bread baking and am the only ww bread baker I know so you guys are the only ones who can answer my novice questions :)

I have been making the Loaf for Learning from Laurel's Kitchen Bread Book, and while I absolutely love the taste and texture of the loaf, my husband complains that the individual slices are too small for a good hearty sandwich.  Is there a trick to using the same recipe to get a higher-rising loaf?  Can I simply do 1 1/2 times the recipe and put it in the same pan for a larger bread?  I know Peter R. has a whole grain bread book with good sandwich loaf recipes, but I wanted to know how to trouble shoot this problem for future reference.  Thanks!