If you are trying to catch up on the books, you might want to check out Barnes & Noble. They have the new SW Chronicles of the Force for $11.56 (same as Amazon). DC SH is $13.66, though. SW Character encyclopedia is $13.94 (Amazon is $13.67). If you get over $50 in books, coupon code BNJUNE30 will subtract 20%. The coupon code will increase to 25% at $100 and 30% at $150.
Now if you want to get super kick-ass, it would appear that the coupon code is doing some funny things... LEGO sets are excluded from the discount. No surprise there. Nor do they raise the purchase amount used to determine the discount level (i.e. $50 in books and $100 in LEGO set gives you the 20% discount, not 25%). But it appears you can get the discount to apply to your total order, including LEGO sets, with some careful sequencing (I didn't complete checkout to see if it actually carries through). If you work quantities in your cart, it will disqualify the promo code. I suggest channeling the zen required to hunt for SYW discounts online if you are trying to get this to work.
To get it to the images below, I did the following.
1. Add the book to my cart
2. Go to cart and increase quantity to 5. (Raise the cart about the $50 for the promo code)
3. Enter the promo code. See about $10 in discount in the cart and indication that promo code BNJUNE30 was applied.
4. Add LEGO set to cart. See the discount increase commensurately.
5. Change quantities and the discount goes poof. Drop the LEGO sets, leaving only the books, and the discount still cannot be applied to order. You might need to clear history or go Incognito to make it work.