The Angel Oracle has nothing to do with tarot. They are not tarot cards at all. Oracle decks are not the same as tarot decks. Each oracle deck is its own unique system. There are Angel Oracles, Fairy Oracles, Goddess Oracles, Rune Oracles, etc and each oracle is completely different than any other oracle while tarot decks all share the same system as each other. Oracle decks have no major or minor arcana, no suits, no "pip" cards and usually no court cards (although the odd Queen or King might show up but not in the same context as with tarot.) Books about tarot will not really help you with your Angel Oracle deck since tarot is a completely different system than your Angel Oracle deck.
That said, you can probably read the Angel Oracle in a similar way as you would tarot. Read the book that came with your Angel cards and that should tell you how the creator intended those cards to be used and give you some guidelines about what each specific card might mean. The book that came with your deck should show you how to use your new cards.
Usually tarot and oracle cards can be read directly from the image, so, after you've read the book and studied your cards a bit, start by laying down a spread (an arrangement of cards with each position having a different meaning, as suggested by your book.) If you can't find spreads in the book that came with your Angel deck, try one of the spreads that might be in your tarot book... experiment with that... stick to simple spreads at first with only a few cards and as you start to figure out how they work, you can move to the more complex spreads. When you lay down a spread, look at the image without reading the book and try to figure out what the image suggests... what is the person or creature on the card doing? What does it feel like? What would happen if you (or your seeker) started to act like the person or creature on the card?
If you are interested in tarot, you'll need to find yourself an actual tarot deck. Look for decks that describe themselves specifically as "tarot" decks, not as "oracle" decks.
The most recommended tarot decks to learn from are based on the Rider Waite deck… the Hanson-Roberts deck, Morgan Greer deck and the Fenestra deck are all good decks that are very close to the Rider Waite in their images. Any deck will do though… find one whose images appeal to you and that “speak” to you. More than anything, personal preference should be your first guide. Don't pick an RW clone deck just because you think you aught to... that can kill your appetite for tarot if you find it ugly.
To choose a good deck for yourself you’ll want a deck that first of all you find appealing… something that will motivate you to use the cards. More importantly, however, you’ll want a deck that “speaks” to you. Find a sample image of one (or several) of the cards. Ask a somewhat random sample question and then look at the image… how would you answer your question if you pulled that card? If the answer comes fairly easily, then it might be a good deck. If it’s a struggle, then it might not be a good deck for you, even if you find it really beautiful.
Best of luck,
tarot reader (I own over a dozen tarot decks and about 3 oracle decks. I prefer my tarot decks to my oracle decks, but that's just personal preference.)