Looking to buy this book on my HK trip

Hello all, hope you are doing well.

I am hoping to get your help finding this book in a physical bookshop on my upcoming week-long HK trip:

ISBN：9789887553434

書名：《小王子（香港粵拼版）》

出版社：藍出版

I am not sure where to start looking, and I read pretty slowly in Chinese so would like to narrow down where to start looking. Are there big physical bookshops you would recommend and do any have websites where I can look up availability in advance?

If you have recommendations on other must-have books for kids and adults looking to improve their Cantonese while living in English-speaking countries I'd be happy to hear them too.

Thanks!