I don't recommend any books for beginners. Needless to say, you can't read "normal" books for adults which are full of Kanji and unfamiliar vocabulary. As for children's books, they are full of broken expressions and onomatopoeia which are unfamiliar to beginners as well. Focus on your learning resources. Come back when you reach the advanced level. There are tons of recommendations.
The Language Level symbol shows a user's proficiency in the languages they're interested in. Setting your Language Level helps other users provide you with answers that aren't too complex or too simple.
Has difficulty understanding even short answers in this language.
Can ask simple questions and can understand simple answers.
Can ask all types of general questions and can understand longer answers.
Can understand long, complex answers.
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