Dear Susan
There are so many Puritans to read and they wrote so much. So it is difficult to narrow down, but permit me to add my 2 cents worth.
Start by collecting all of Thomas Watson's works - these are real gems!
Then add the works of Thomas Brooks - like Watson he packs a great deal with Pithy sayings etc. Read for instance his "Precious Remedies" for a flavour of the rest of his writings!
For a truly fantastic devotional Scripture commentary (not verse by verse or in any sense exegetical) but a truly great meditational commentary- read Joseph Hall's "Contemplations" - This is searching and heart warming!
Add volumes 6 and 7 of Owen's works - on "Temptation and Sin" and "Sin and Grace"
And Finally Add Bunyan's complete works.
Here in short compass, I believe you have the very cream of puritan writings aimed at a closer walk with the Lord.
Wishing you every blessing.
If you want to taste these works before deciding to buy them, visit my website at:
Book Academy
PS. Hall's commentary is under the Commentaries section