For what we know, Columbus traveled to Chios.
He talks about his voyages in Chios in his own diary (12th November 1492) when describing what he found in actual Cuba, when describing mastic plant:
E in questo Río de Mares, dal quale salpai questanotte, v’è senza dubbio grandissima abbondanza di mastice, la quale si potrà aumentare soltanto a volerlo, ché i medesimi polloni, piantati, prendono subito, e vi sono alberi, molti e molto grandi, e hanno la foglia e il frutto come lentisco, salvo che sono piú grandi, gli alberi come la foglia, di quelli che Plinio menziona e che io vidi nell’isola di Chio, nell’Arcipelago
Rough english translation:
And in Río de Mares, from which I sailed last night, there is without doubt abundance of putty, which can be increased at will, because the same shoots, planted, take ground immediately, and there are trees, lots and big, and they have the leaf and the fruit like mastic, even if they are bigger, both the tree and the leaf, of those that Plinio mention and that I saw in the island of Chio in the archipelago
source: diario di bordo di cristoforo colombo
Those trip may have happened in 1474 and 1475, when Genoese Republic organized expedition in Chio as supposed by many historians.
As the second part of your question, not sure what you mean.
I may suggest - even if I'm not sure they are availabe in english - this book