diff --git a/db/nosql/clickhouse/docs/courses.txt b/db/nosql/clickhouse/docs/courses.txt
index b41205ff8..0e7a61f92 100644
--- a/db/nosql/clickhouse/docs/courses.txt
+++ b/db/nosql/clickhouse/docs/courses.txt
@@ -4,8 +4,9 @@ ClickHouse - Learn ClickHouse with Mark of p47
 2024
 Otus - ClickHouse for engeneers and DB architects of p12
     https://vkvideo.ru/playlist/-145052891_167
-CH for Data Engeneers
+CH for Data Engeneers of p6
     https://nnmclub.to/forum/viewtopic.php?t=1727486
+    p2 1:32:00 of 2:42:44        
     https://www.infosystems.ru/courses/SQL/CB024/
     https://github.com/clickHouse-courses-materials
     https://github.com/Clickhouse-Courses-Materials/clickhouse-2024-10-01
diff --git a/db/nosql/clickhouse/docs/presentations.txt b/db/nosql/clickhouse/docs/presentations.txt
index b62bdff4c..12844ac1e 100644
--- a/db/nosql/clickhouse/docs/presentations.txt
+++ b/db/nosql/clickhouse/docs/presentations.txt
@@ -2,7 +2,7 @@ https://presentations.clickhouse.com/
     https://presentations.clickhouse.com/2017-shad/index.html
 
 2025
-SqlNinja - Artemiy - What Is the Truth from What is Talking about ClickHouse of 1:05:58
+SqlNinja - Artemiy - What Is the Truth from What is Talking about ClickHouse 36:00 of 1:05:58
     https://www.youtube.com/watch?v=7ziBC_lb6TY
     ! CH is motly like LSM-tree (SS-Table), write-optimized (MergeTree engine)
     ! CH has no mem-table (data is going directly to disk)
@@ -14,6 +14,13 @@ SqlNinja - Artemiy - What Is the Truth from What is Talking about ClickHouse of
     ! 9:00      Over time we merge chunks into a bigger ones
     ! 10:00     OPTIMIZE TABLE <table-name>;
     ! 11:00     SELECT active, name, rows FROM system.parts WHERE database='test' AND table='table';
+    ! 16:00     mutations (ALTER TABLE <table-name> UPDATE/DELETE WHERE ...)
+    ! 18:00     mutations are faster than optimizations, but slow in general, non-consistent if dropped in the mean-time
+    ! 21:00     async_insert setting is available at CH (around 1-sec buffer)
+    ! 23:00     indexes consist of granulas (can represent multiple records each)
+    ! 25:00     SELECT part_name, mark_number, rows_in_granule, idx FROM mergeTreeIndex('test', 'table') LIMIT 4;
+    ! 32:00     SET send_logs_level='trace' SELECT ...
+    ! 35:00     SELECT ... SETTINGS join_algorithm='full_sorting_merge';
 Otus - Integration with Kafka, PG, S3 and Superset ru of 1:27:53
     https://www.youtube.com/watch?v=GOT0kiOy-_M
     ! tg chat ???
diff --git a/pl/cross/tools/build/cmake/docs/books.txt b/pl/cross/tools/build/cmake/docs/books.txt
index 11e4b0b50..1837e9744 100644
--- a/pl/cross/tools/build/cmake/docs/books.txt
+++ b/pl/cross/tools/build/cmake/docs/books.txt
@@ -6,7 +6,9 @@ https://cliutils.gitlab.io/modern-cmake/modern-cmake.pdf
 2024
 Hulton-Harrop - Minimal CMake
     https://libgen.gs/edition.php?id=150898055
+    https://libgen.gs/ads24d02b6780ccd97288f1c67371ea0295PFWTU84F
     https://libgen.gs/ads0b41215a7f302ef58307e4c372b2e5342BIG1HDZ
+    https://annas-archive.org/slow_download/24d02b6780ccd97288f1c67371ea0295/0/0
     http://localhost:8080/ipfs/bafykbzaceaa2b7achagflhxd7vsjgjezknmg67egaf3sz2wjz34hmivzjbjpq?filename=[]%20Tom%20Hulton-Harrop;%20-%20Minimal%20CMake:%20Learn%20the%20best%20bits%20of%20CMake%20to%20create%20and%20share%20your%20own%20libraries%20and%20applications%20(2024,%20Packt%20Publishing).epub
     ipfs - bafykbzaceaa2b7achagflhxd7vsjgjezknmg67egaf3sz2wjz34hmivzjbjpq
     http://libgenfrialc7tguyjywa36vtrdcplwpxaw43h6o63dmmwhvavo5rqqd.onion/LG/06411000/24d02b6780ccd97288f1c67371ea0295