Tu Hua has five books, which are a collection of modules.
Zhonggong is two books, which are subject examination and applied theory.
You can search on Taobao, which is relatively cheap.
But I suggest you buy one or two sets. Hehe, I bought both sets, and then I passed the civil service exam by luck this year. I just went to the physical examination today. You can ask me if you have anything to communicate.
For reference, I recommend a website. You can search QZZN in Baidu. There are examination papers for civil servants everywhere on this job guide website. I can't send a website link here, so I won't put the specific address. Besides, you can also find many electronic versions of civil service examination books. This website should be the largest civil service examination website in China. There are also many friends who help each other, and many enthusiastic people will upload examination papers. ...
I hope my answer can help you, come on! ! ! ! ! !