I've heard great things about 5 Points. I've been thinking of picking it up myself.
Five points is a fine book, but very, very short and mostly about communication and presentation. Not so much about tricks or sleights.
Sonata has some magnificent effects in it, and is probably more 'fun' to read than Mnemonica (which is also, of course, excellent).
But Tamariz himself has nothing but praise for Ascanio, and the Magic of Ascanio series of books is great.
Basically, you can't go wrong. But every one of the books I mentioned has its own different 'style' and so one may 'speak' to you more than another.