The Book People have another Flash Sale on at the moment PLUS if you use code EXTRA10 you'll get another 10% off at checkout.
I had a quick browse of the sale & their are some fab buys included ie Mr Men The Complete Collection of 50 Books just £25.20 Delivered with the code.
You have to spend £25 after discount code is applied to get FREE Delivery, so The World of Peter Rabbit Complete Collection - 23 Books is £27 before the code, if you use the code, it takes you under the threshold for free delivery, so either buy as it is or add a little something on top & use the code to bring the price down. You could add a £1.99 Gift Bag & get that & the Books Delivered for £26.09.
Horrid Henry is currently £20, so use the 10% off code to bring it down to £18 (+ del £2.95 if order less than £25)
Link goes to Mr Men, will pop links to others in 1st post