Can anyone suggest a good IFR workbook.
Questions at the end of each chapter to test what you learned.

Jeppesen Instrument/Commercial Manual is pretty solid.

I cannot recall a workbook. But if you are getting ready for your checkride, i suggest http://pilotscafe.com/download/IFRQuickReviewSheets.pdf

I just took the information on these pages and wrote them down until i could recite them to my instructor when he asked.

There are the most useful app for IFR.
Pilot Trainer – IFR Pack – Flygo-Aviation Ltd.
ADF + RMI (IFR) Instructor by FlyGoo – Flygo-Aviation Ltd.

I really like these, easy to use, and give me lot of practicing opportunities.

I hope it was helpful.

There are the most useful app for IFR.
Pilot Trainer ? IFR Pack ? Flygo-Aviation Ltd.
ADF + RMI (IFR) Instructor by FlyGoo – Flygo-Aviation Ltd.

I really like these, easy to use, and give me lot of practicing opportunities.

I hope it was helpful.