The C++ Programming Language, 4th Edition
https://www.amazon.com/C-Programming-Language-4th/dp/0321563...
He's also writing a new book that's available in Rough Cuts from O'Reilly that covers C++11/14: http://scottmeyers.blogspot.com/2014/06/effective-modern-c-s... and has given a talk covering some of the same ground: http://vimeo.com/97318797
Herb Sutter has "Elements of Modern C++ Style": http://herbsutter.com/elements-of-modern-c-style/ and has given several talks, such as http://channel9.msdn.com/Events/Build/2014/2-661
Finally, you can't really beat Stroustrup's book: http://www.amazon.com/The-Programming-Language-4th-Edition/d...
In no particular order:
1- http://www.amazon.com/C-Programming-Language-2nd-Edition/dp/...
2- http://www.amazon.com/The-Answer-Book-Solutions-Programming/...
3- http://www.amazon.com/The-Standard-Library-P-J-Plauger/dp/01...
4- http://www.amazon.com/C-Traps-Pitfalls-Andrew-Koenig/dp/0201...
5- http://www.amazon.com/Expert-Programming-Peter-van-Linden/dp...
6- http://www.amazon.com/Data-Structures-In-Noel-Kalicharan/dp/...
7- http://www.amazon.com/Data-Structures-Using-Aaron-Tenenbaum/...
8- http://www.amazon.com/Mastering-Algorithms-C-Kyle-Loudon/dp/...
9- http://www.amazon.com/Code-Complete-Practical-Handbook-Const...
10- http://www.amazon.com/Design-Patterns-Elements-Reusable-Obje...
11- http://www.amazon.com/The-Mythical-Man-Month-Engineering-Ann...
12- http://www.amazon.com/The-Programming-Language-4th-Edition/d...
13- http://www.amazon.com/The-Standard-Library-Tutorial-Referenc...
14- http://www.amazon.com/API-Design-C-Martin-Reddy/dp/012385003...
15- http://www.amazon.com/The-Linux-Programming-Interface-Handbo...
16- http://www.amazon.com/Computer-Systems-Programmers-Perspecti...
17- http://www.amazon.com/System-Programming-Unix-Adam-Hoover/dp...
18- http://www.amazon.com/Memory-Programming-Concept-Frantisek-F...
19- http://www.amazon.com/Memory-Management-Implementations-Prog...
20- http://www.amazon.com/UNIX-Filesystems-Evolution-Design-Impl...
21- http://www.amazon.com/PCI-System-Architecture-4th-Edition/dp...
22- http://www.amazon.com/Universal-Serial-System-Architecture-E...
23- http://www.amazon.com/Introduction-PCI-Express-Hardware-Deve...
24- http://www.amazon.com/Serial-Storage-Architecture-Applicatio...
25- http://www.amazon.com/SATA-Storage-Technology-Serial-ATA/dp/...
26- http://www.amazon.com/Beyond-BIOS-Developing-Extensible-Inte...
27- http://www.amazon.com/Professional-Assembly-Language-Program...
28- http://www.amazon.com/Linux-Kernel-Development-3rd-Edition/d...
29- http://www.amazon.com/Version-Control-Git-collaborative-deve...
30- http://www.amazon.com/Embedded-Software-Primer-David-Simon/d...
31- http://www.amazon.com/Programming-Embedded-Systems-C/dp/1565...
32- http://www.amazon.com/Making-Embedded-Systems-Patterns-Softw...
33- http://www.amazon.com/Operating-System-Concepts-Abraham-Silb...
34- http://www.amazon.com/Performance-Preemptive-Multitasking-Mi...
35- http://www.amazon.com/Design-Operating-System-Prentice-Hall-...
36- http://www.amazon.com/Unix-Network-Programming-Sockets-Netwo...
37- http://www.amazon.com/TCP-Illustrated-Volume-Addison-Wesley-...
38- http://www.amazon.com/TCP-IP-Illustrated-Vol-Implementation/...
39- http://www.amazon.com/TCP-Illustrated-Vol-Transactions-Proto...
40- http://www.amazon.com/User-Interface-Design-Programmers-Spol...
41- http://www.amazon.com/Designing-Interfaces-Jenifer-Tidwell/d...
42- http://www.amazon.com/Designing-Interfaces-Jenifer-Tidwell/d...
43- http://www.amazon.com/Programming-POSIX-Threads-David-Butenh...
44- http://www.intel.com/p/en_US/embedded/hwsw/software/hd-gma#d...
45- http://www.intel.com/content/www/us/en/processors/architectu...
46- http://www.intel.com/p/en_US/embedded/hwsw/hardware/core-b75...
47- http://www.hdmi.org/index.aspx
48- http://en.wikipedia.org/wiki/Digital_Visual_Interface
49- http://www.amazon.com/Essential-Device-Drivers-Sreekrishnan-...
50- http://www.amazon.com/Making-Embedded-Systems-Patterns-Softw...
51- http://www.amazon.com/Python-Programming-Introduction-Comput...
52- http://www.amazon.com/Practical-System-Design-Dominic-Giampa...
53- http://www.amazon.com/File-Systems-Structures-Thomas-Harbron...
54- ...well, I'll stop here.
Of course, the equivalent knowledge can be obtained by trial-and-error, which would take longer and might result in costly errors and imperfect design. The greater danger here is that a sole developer, without the feedback and interaction of even a small group of capable and experienced programmers could simply burn a lot of time repeating the mistakes made by those who have already trenched that territory.
If the goal is to write a small RTOS on a small but nicely-featured microcontroller, then the C books and the uC/OS book might be a good shove in the right direction. Things start getting complicated if you need to write such things as a full USB stack, PCIe subsystem, graphics drivers, etc.
The 4th edition of Stroustrup's classic was updated to reflect modern practices. [0]
Scott Meyers, author of Effective C++ also wrote Modern Effective C++. [1]
Lastly for pure online reference, cppreference.com. [2]
[0] https://www.amazon.com/C-Programming-Language-4th/dp/0321563...
[1] http://shop.oreilly.com/product/0636920033707.do
[2] http://en.cppreference.com/w/