Hello,

I hope all of you are in good health. Currently, I work for a company specialized in water well geological and mining drilling and I need to refresh my knowledge. So, if someone have these books (see below) and can give me a copy of all of them, this should be really helpful for me ...

- Time Effects in Rock Mechanics (Materials Modelling & computation) by N. D. Cristescu and U. Hunsche
- Boundaries of Rock Mechanics: Recent Advances and Challenges for the 21st Century by Meifeng Cai and Jin'An Wang
- Excavations and Foundations in Soft Soils (Kindle Edition) by Hans-Georg Kempfert
- Rock Mechanics & Rock Engineering by Springer Verlag

If you need something in these fields let me know. Thanks for your help.