OT/NT Theologies

I notice that I do not have any OT or NT Theology books and was thinking about getting at least one next month when my budget resets and books that will meet my book budget per month. I do not wish to get anything too complicated or too long and so have the following in mind.

OT

Gospel and Kingdom, The

Dominion and Dynasty: A Biblical Theology of the Hebrew Bible (New Studies in Biblical Theology)

NT

New Testament Theology by Leon Morris

These do not look to be as big as some others I saw and I want some opinions on them if anyone has any. Thanks..