Why are hobbies so expensive!

Very 'Deep' veggie. I forgot about the books. I am finally on the sixth and final tome of Earths Children. It has taken me over a year to get this far as I got the full set two Christmasses ago!
The huge tome I am reading just now is Mark Bowdens Guests of the AYATOLLAH. Author of Black Hawk Down which I have also read.Totally enthralling book. 

I have Earths Children for bedtime reading and a book in the front living room plus a book in my den in the back all on the go at the same time! I also have a full bedroom devoted to books and the attic is also getting filled up with  them!