Oh no! I am suppose to read this book for my hist151 class, but with all the other "more important" courses i am currently busy with, i didn't have time to read it. Heck, i didn't even buy the book! I need to know what this book is about, because i will be tested on in a couple of days. All i know is that the book is written by VAN GULIK, and within the book, there are 3 main cases: the double murder at dawn?, the strange corpse, and the poisoned bride. I tried looking for a summary online, but i couldn't find any.
Please give me some info about what is going on in the book, and maybe give me some important points that i have to know about for the book. 
Thanks in advance.
Thanks in advance.