I assume that from what you wrote, you are trying to find a book to increase your vocabulary. If that is the case, I would recommed using the JLPT study lists on the website and the words and kanji to your drills.
If you are looking for reading material, try out the link at the bottom. It's a news that post up small news articles written in simple japanese. If you completed the majority of lessons on this site, you should be able to understand most of the grammar in the articles, but you will need to use nihongo master or google translate to look up words and then add those words to your drills in nihongo master.
hope this helps!
ああ、それは便利など具ですね。度もありがとう。 ：）Jace *\(^o^)/*
Commented 6 years ago