Hello,

from my (limited) experience with LR, I see no problem in having mixed IVs. I have seen many application of LR in research fields where both continuous and categorical predictors are used.

As for LR in general, I found this book interesting:

1. Allison PD. Logistic Regression Using the SAS System: Theory and Application. Cary: Wiley-Blackwell; 2001.

1. Hosmer DW, Lemeshow S, Sturdivant R. Applied Logistic Regression. Third. Hoboken, NJ, USA: John Wiley & Sons, Inc.; 2000.

More understandable to persons with not extensive math knowledge, I found this useful:

Field, Discovering Statistics using IBM SPSS Statistics

hope this helps

gm