This lovely bookmark is actually more of a construction than a piece of crochet-tatting! I believe I counted 38 ends to tuck in. However, it takes longer to tell than to do, and goes very quickly.
The general plan is to make 3 rings, then make 3 squares out of them joining corners as you go, and then make the webbing in the 4 corners formed by those joins.

Notice and keep right sides of pieces in the same direction as you work.

Stitches:
Crochet stitches
sl st - slip stitch
sc - single crochet
dc - double crochet

Cro-tat stitches
ds - 2-part double hitch stitch
p (picot) - 3/16” gap between ds
small p (small picot) - 1/8” gap between ds

30 seed beads