diff --git a/README.md b/README.md
index 4929a03..6c94d82 100644
--- a/README.md
+++ b/README.md
@@ -234,8 +234,8 @@ _________________
 
 #### Algorithms & Data Structures
 
-- [💎 Grokking Algorithms - Aditya Y. Bhargava](https://www.manning.com/books/grokking-algorithms)
-- [Introduction to Algorithms - Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest and Clifford Stein](http://mitpress.mit.edu/9780262367509/introduction-to-algorithms/)
+- [Grokking Algorithms - Aditya Y. Bhargava](https://www.manning.com/books/grokking-algorithms)
+- [💎 Introduction to Algorithms - Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest and Clifford Stein](http://mitpress.mit.edu/9780262367509/introduction-to-algorithms/)
 - [Collection of various algorithms in mathematics, machine learning, computer science, physics, etc implemented in C for educational purposes](https://github.com/TheAlgorithms/C)
 - [Udemy – Embedded Systems State Machines & Data Structures](https://www.udemy.com/course/embedded-systems-state-machines-data-structures-like-a-pro/)
 - [Data Structures in C](https://www.sanfoundry.com/c-programming-examples-data-structures/)
@@ -673,8 +673,8 @@ _________________
 - [Udemy – Digital Signal Processing (DSP) From Ground Up in C](https://www.udemy.com/course/digital-signal-processing-dsp-from-ground-uptm-in-c/)
 - [Real-Time Digital Signal Processing: Fundamentals, Implementations and Applications - Sen M. Kuo, Bob H. Lee, Wenshun Tian](https://www.wiley.com/en-us/Real+Time+Digital+Signal+Processing%3A+Fundamentals%2C+Implementations+and+Applications%2C+3rd+Edition-p-9781118414323)
 - [Real-Time Digital Signal Processing from MATLAB to C with the TMS320C6x DSPs - Thad B. Welch, Cameron H.G. Wright, Michael G. Morrow](https://www.routledge.com/Real-Time-Digital-Signal-Processing-from-MATLAB-to-C-with-the-TMS320C6x/Welch-Wright-Morrow/p/book/9780367736453)
-- [Digital Signal Processing - John G. Proakis, Dimitris K. Manolakis](https://a.co/d/75P5PiE)
 - [Schaum's Outline of Signals and Systems - Hwei P. Hsu](https://www.mhprofessional.com/schaum-s-outline-of-signals-and-systems-fourth-edition-9781260454246-usa)
+- [💎 Digital Signal Processing - John G. Proakis, Dimitris K. Manolakis](https://a.co/d/75P5PiE)
 
 #### Discrete Fourier Transform / FFT
 
@@ -691,8 +691,8 @@ _________________
 - [PID Controller Explained](https://www.youtube.com/watch?v=fv6dLTEvl74)
 - [Understanding PID Control](https://youtube.com/playlist?list=PLn8PRpmsu08pQBgjxYFXSsODEF3Jqmm-y)
 - [PID Controller Implementation in Software - Phil's Lab #6](https://www.youtube.com/watch?v=zOByx3Izf5U)
-- [Control Systems Engineering - Norman S. Nise](https://www.wiley.com/en-us/Control+Systems+Engineering%2C+8th+Edition-p-9781119474227)
-- [Modern Control Systems - Richard C. Dorf, Robert H. Bishop](https://www.pearson.com/en-us/subject-catalog/p/modern-control-systems/P200000003484/9780137307098)
+- [💎 Control Systems Engineering - Norman S. Nise](https://www.wiley.com/en-us/Control+Systems+Engineering%2C+8th+Edition-p-9781119474227)
+- [💎 Modern Control Systems - Richard C. Dorf, Robert H. Bishop](https://www.pearson.com/en-us/subject-catalog/p/modern-control-systems/P200000003484/9780137307098)
 
 #### MATLAB / Simulink