Where can can I send off for maps and guides for travel in England,Ireland, and Wales?

If you are a AAA member they will give them to you for free and even help you plan the best routes and hotels..

DKEyewitness is one of the best travel guides I have found, and their book on Ireland is amazing!
Ireland (Eyewitness Travel Guides) (Turtleback) on Amazon

Go and join your local library and check out all the travel books they have on Ireland, England and Wales.

Read through them, all have different points of interests and layouts. You need to find the one which best suits you and your travel arraingments.

Pick what interests you from them all and renew the one/s you like best or buy it.

Good luck!