I don't know if it's region locked, but you can only buy ebooks on your country's Amazon anyway. Here's the UK link
As noted, it's available free online, but if you wanna buy a Kindle version direct from Amazon (I did), check this: https://www.amazon.com/Romance-Three-Kingdoms-Luo-Guanzhong-ebook/dp/B019PLY87K/
At least in terms of readability, it's been sufficing just fine. 82% through, gonna replay the DW8XL story mode after I finish up in order to fascinate myself w/ all the little alterations - and accuracies.
yesterday I uploaded to give away my ebook https://www.amazon.com/gp/product/B0B37WYNBX/ref=dbs_a_def_rwt_hsch_vapi_tkin_p1_i0 for free. Then i discovered the interior file table didn't render properly on kindle, even though it rendered rightly on my computer. i corrected it, checked it, and reuploaded it. I apologize. If you downloaded my Chinese ebook yesterday please download it again. thank you for your comprehension.
I've been reading <em>The Secret Garden</em> from Amazon Kindle. It's a graded reader book, aimed around HSK2 as well, and provides explanations of any words it thinks you won't understand. It's been really good!
Just a James Legge Translation, which is okay, but you will need to supplement it in order to really catch on. Of course, there are better versions of some of the classics and four books, but Legge is the only one so far who I can see has translated all of them.
I am nowhere near your level, but i have used half reading and half Google translate to read your question, and i just wanted to chime in. People often say you should look at the 'right' version of grammar only, but for me I really need to see the wrong versions too and have it fully explained why the right version is right! So i understand your struggle. I am personally using these books: https://www.amazon.co.uk/Chinese-Grammar-Wiki-BOOK-Elementary-ebook/dp/B01CHNZ75A to have grammar points explained to me (as well as the HSK books, but i find the wikis really helpful!) so maybe that might help you?
Also, to me, at my level, your Chinese looks great! Hope you can keep improving and find a way to help your grammar points!
You can preview it on the Amazon page. Seems like it's the same.
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It looks like it's not maintained these days, but there's an online resource cached by Google that had annotations by readers that helped explain things. It's not exactly pretty given the current state of the website but:
EDIT: Alternatively, the Kindle ebook version is $2 on Amazon. I grabbed it and have scrolled through. Tons of names are casually thrown around and some are different from the Koei spellings (i.e. Zhang Jiao is Zhang Jue in the version I have), but it's 4000 pages of reading for a couple bucks.
Well, there is this list of the most common radicals, which would also help you. http://www.yellowbridge.com/chinese/radicals.php
And if you are learning simplified hanzi, you can consider using this book: https://www.amazon.com.br/Tuttle-Learning-Chinese-Characters-Revolutionary-ebook/dp/B00KV1SK1E/ref=sr_1_1?ie=UTF8&qid=1478521960&sr=8-1&keywords=chinese+characters+tuttle
It always introduces a non-compound character before using it in a compound character
This is a much better book for the beginner. Explanations, cultural tie ins, and example sentence, as opposed to OP's book which is literally just a list of idioms.
This is the serious idiom book. Most suitable for at least intermediate learners. Thorough explanations, comparisons, examples, and even origin stories for the chengyu (in Chinese).