Looking for one book for preparation for the exam of level A1 in European Portuguese

I also suggest the book " Gramática átiva 1", in which you can find grammar rules and more exercises.

https://www.amazon.it/Gram%C3%A0tica-activa-1-en-portugais/dp/9727576389/ref=mp_s_a_1_1?keywords=gramatica+ativa+1&qid=1582169183&sprefix=gramatica+ativa&sr=8-1

If you want to learn european portuguese you can start with "Português XXI". We used this book at the university (the 1st year).

https://www.amazon.it/Portugues-Xxi-Edicao-Caderno-Exercicios/dp/9897523898/ref=mp_s_a_1_1?keywords=portugu%C3%AAs+xxi&qid=1582168073&sr=8-1

I also suggest the book " Gramática átiva 1", in which you can find grammar rules and more exercises.

https://www.amazon.it/Gram%C3%A0tica-activa-1-en-portugais/dp/9727576389/ref=mp_s_a_1_1?keywords=gramatica+ativa+1&qid=1582169183&sprefix=gramatica+ativa&sr=8-1

I did not find any indication of books, but I will point you three sites:

https://www.omniglot.com/language/phrases/portuguese.php

http://hackingportuguese.com/tips-and-tricks/practicing-listening-comprehension/

They also teach European Portuguese:

https://www.instituto-camoes.pt/en/activity-camoes/what-we-do/learn-portuguese

Hope this helps.