The intention here is to simply list some books that:

• Are available for free

• I've found useful & think may be of use for others too!

Foundation Design

The Red Book_Basics of Foundation Design-UPGRADED.pdf (by Professor B. H. Fellenius)

Statistics and Random Fields

NIST/SEMATECH e-Handbook of Statistical Methods

Random Fields (by Professor Erick VanMarcke)