For the beginners, I recommend to buy
" Elements of Strength of Materials by Timoshenko"
You can buy the used book at only \ 184, of course apart from shipping charge.
Timoshenko is one of the authorities of this fields and the book above
,in my opinion, is most suitable for your request.
Most of his works are for more advanced technicians, but only this old book mentioned above is for the beginners.
You shall read easily and understand perfectly.