I am a Spanish student who wants to prepare a exam to get the B2.2 title of French (DELF). Currently I just have the DELF A2 title that I got the last time that I studied French in a school, around four years ago.
Since then I've been studying French in my own, reading books, using some websites like Babbel, listening to some podcasts, ...
I feel now that I can comprehend most of the texts that I will encounter in the real exam (I've been able to read some French books both modern and "classical" without having much trouble) and I also feel that my vocabulary and oral comprehension are good enough to pass the test.
Where I really feel the difference is when it comes to grammar. Studying on my own I have dedicated very little time to grammar and I really need to improve my knowledge of it.
I own Bescherelle's La conjugaison and I want to buy a book that allows me to learn at least enough grammar to pass the test.
So my question is, what book should I use? I know that this depends a lot on every person and I don't mind getting a book with lots of vocabulary as long as I could learn what I need from it.