The Omega is priceless.
Ever curious, I was searching about the book and found your 2016 post
https://livinguktaiwan.wordpress.com/2016/09/19/bopomofo-%E3%84%85%E3%84%86%E3%84%87%E3%84%88/
Someone is trying to sell that book at 1,500 HKD
https://www.carousell.com.hk/p/%E5%94%90%E5%AD%97%E9%9F%B3%E8%AE%80%E7%84%A1%E5%B8%AB%E8%87%AA%E9%80%9A%E8%8B%B1%E8%AA%9E%E6%8C%87%E5%8D%97%E9%87%9D-%E8%88%8A%E8%AA%B2%E6%9C%AC-1180055149/
Wonder what the transistors are for.