This top is constructed side to side, the only seaming is at the ends of the straps to the back. The top has 0 to +2" of ease, depending on your bust size. The pattern is made completely in Tunisian Simple Stitch. The loop on your hook at the beginning of the FwdP counts as a stitch and the edge stitch counts as a stitch. It can help to mark the first stitch (not the loop on hook) and the edge stitch of the row; these are the places the st(s) can easily be overlooked, resulting in a loss of stitches.
The pattern is written as follows, 1, 2, 3, 4, 5, 6, 7, 8.

To meet gauge is essential for the correct fit of the piece. After blocking the gauge should be: 16 st x 14 rows = 4" x 4" (10 cm x 10 cm) square in Tunisian Simple Stitch.