Depends on how strong is your basics.

A good physics book which i enjoyed reading is the "Feynman Lectures". Maybe you can start there though if you say you forgot most of secondary level physics, it may be tough.

Since secondary physics is where you left off, I think reading an A-level book would be appropriate as it isn't too hard to understand. If you'd want to get something short, I would suggest reading 'Longman Advance Level Physic' by Loo Kwok Wai (Longman). If you would like something deeper try 'Physics for Scientists and Engineers' by Raymond A. Serway that can be found at our uni library (location: QC23 SER f). Personally, I found those books easy to understand and interesting. All the best! 

Edit: Grammar