Will there be a season 4 of Bosch?

Every once in a while I check on Amazon and I thought I saw a
notice that season 4 was upcoming, but perhaps I was confused,
or things have changed.

Does anyone know if they will continue this series, it's been a
pretty solid detective series so far?

OK, just did a Google search and found out it said that there will
be a 4th season starting early 2018 ... but the notice on Amazon
is gone still. Is it delayed or cancelled?