First, the current level of hard-pen copybooks is very low, and most of those copybooks are written by people who can't write or write. Now those who really know calligraphy are all calligraphers, and they don't want to take out hard-pen copybooks at all.
Second, some people in the hard pen world write very well, but according to my observation, at least for now, they have never published copybooks, or they may be too disdainful to publish copybooks, so they can't buy them.
Third, we must learn the words of the ancients when learning hard-pen characters. Like a brush, you need to learn ancient calligraphy, although the writing tools are different. Today's hard altar masters are all ancient people. This is the best choice for learning calligraphy.
Fourth, it's not that the hard-written copybooks are not good, but some of them are high-level. Such as Lu Zhongnan, Cui Xuelu and other countries. But they all have profound brush skills, and the hard pen words are also from the brush. For example, Lu Zhongnan's hard pen adopts the method of 90% palace, and Cui Xuelu's official script adopts the method of ritual tablet. But I haven't found a good hard copy of cursive script yet.
Therefore, if the landlord wants to learn calligraphy (not just writing regular Chinese characters), he must learn calligraphy and methods. If you just study hard-pen copybooks, you will be poisoned deeply, and your writing will go into a dead end unconsciously.
As far as learning cursive script is concerned, the ancient posts that can be learned are Sun's Book Score and Wang Xizhi's Seventeen Posts. If the landlord likes Huai Su, he can also study his things, such as eating fish stickers and cursive characters, all of which are good examples.