**The excellent and unique Geometry book is available at below link or 友谊书局 (新加坡 百胜楼 3楼 Bras Basah Complex, Victoria Street):**

http://m.dangdang.com/touch/product.php?pid=21120565&sid=bb1368df71a7809d&recoref=search

References:

https://tomcircle.wordpress.com/2013/04/21/new-geometry-%e6%96%b0%e5%87%a0%e4%bd%95/

**The famous Butterfly Geometry Problem**:

https://tomcircle.wordpress.com/?s=butterfly&submit=Search