I just wanted to order Lee Chang Ho tesuji and life and death sets from Yellow Import page, but the paying something like 140$ for it (including shipping). I guess it still isn't that expensive, because each book is 250 pages long, so something like 12$ per book is quite cheap.
But I already have following problem books:
1001 Life and Death Problems (mastering the basics series)
501 Tesuji Problems (mastering the basics series)
Get Strong at Tesuji
Get Strong at Life and Death
Art of Capturing Stones (ordered from Yutopian and waiting for its arrival)
Rescue and Capture (same state as Art of Capturing Stones)
A small tsumego book in Polish language by Akinobu Tozawa for 6-8 kyu players
Printed versions of Elementary and Intermediate Cho Chikun problems without answers provided by Tasuki on his website.
Other problem books I have are:
Get Strong at the Opening
Get Strong at Invading
Making Good Shape
Attacking and Defending Moyos
All About Ko
The truth is I only solved Get strong at Tesuji, 1001 life and death problems, elementary Cho Chikun problems and the small Polish tsumego book once till now, and haven't started any of the other books I mentioned. I also have as many or more theory go books to read.
Buying Lee Chang Ho 12 problem books would multiple the amount of material I could work with, and sounds exciting, but also somehow wrong...
I am almost sure that something must be wrong with my approach to this, I guess that solving problems from books I already have once will take me much time and yield a significant boost to my playing abilities, so what's the point of buying more of them, besides the ill urge to hoard stuff..
What do You think about this situation, and how do You deal/would deal with it?