Need help identifying an old sci fi or fantasy novel

[FSogol]

only details I remember were one of the character left our earth/dimension/whatever and when he came back all his money, ids, etc had the printing backwards. I remember a kangaroo also.

Not much to go on, but I'm sure someone knows what I am talking about.

[SheilaT]

1. Sure sounds interesting,

but does not ring a bell at all. Hope someone else here knows it.

[Little Star]

2. Can you remember the name's of any characters?

[FSogol]

3. Someone in the SciFi group remembered it.

"Doorways in the Sand" by Roger Zelazny

[Little Star]

4. Glad you got your answer!

[FSogol]

5. Yeah, that's what is nice about groups like this. Someone almost always knows the answers.