This is a Japanese book that teaches katakana wordsーthe foreign-origin words that have been made into the Japanese language. Many of them are actually from English, so you can learn which English words have been adopted into Japanese as katakana words and whether the meanings remain the same or not. The book starts with a manga explaining katakana words in general and then teaches individual katakana words.
There's one katakana word per page and each word comes with the definition, one or two example sentences, and a four-panel Doraemon comic strip. The comic strip shows how the word is used in conversation.
The book is entirely written in Japanese, so it's for intermediate to advanced Japanese learners. That said, all kanji has furigana, so you'll be able to read it if you know hiragana and katakana. The manga is cute and fun, and the illustrations help comprehension. If you are looking for something to read that also teaches you Japanese (in this case, katakana words) this is for you!