'The elements of style' by William Jr. Strunk

This book has taught me a lot of things that will help me in my writing. It is not true that the book does not teach anything to a person contriving to write well. For instance, you have to write a possessive pronoun as a subject of a noun-verb (gerund) when writing in formal style (“they have permitted his walking at the countryside”). Another rule that the book has taught me is avoiding indefinite subjects like “it is”, “there are” or “this is”. Instead of this, you should rewrite the phrase (“There are plenty of medlars in the princess’ garden” = “Plenty of medlars decor the princess garden”). The book contributes with many topics to a person longing to write well.
The book offers an idea about the style which is reformulating the main idea in different manners to emphasize it within a paragraph. Writing the main idea of a text in only one manner does not emphasize it. You should write the main idea in different manners because this idea remains highlighted; because the reader focuses on it, and because the text is more ordered (spoiler alert: “According to the message you are trying to communicate in your writing, you may”, the writer maintains, “relate the body of the paragraph to the topic sentence in one or more of several different ways”). Namely, you have to write the topic you are referring to in several ways so that you highlight this topic.
This book will appeal to those who want to be writers and to those who already are good redactors. This leads us to a conclusion. Reading this book should be attached to practise. Doing it without writing in the manner it teaches is useless.

'The story of English in 100 words' by David Crystal

 The author has written many books about the English language. Some of them are about grammar. Grammar, in language, is what builds the meaning of what we say and write. But this book is about semantics. It is about words which are the pieces of the language.

One strong point of the book is its method. He digs into the story of selected words. Then, he tells us which is their story. He explains their pedigree. Who the dad and the mom of each word are. Another strong point is that the stages of the History of English are very well drawn. Each stage has representative words analysed by Crystal. However, something you may miss in this book is a complete index of cites. Crystal is a very cult writer. He makes a lot of references. One would like, once finished reading, come back and look for these references.
Reading this book has been very pleasant for me. It will appeal to people who like the history (story) of English, and philological curiosities.